본문 | 7 쪽
개념
콕콕
000
1
⑴ 6, -6 ⑵ 14, -14 ⑶ 0 ⑷ 없다. ⑸ ;7!;, -;7!; ⑹ 1.2, -1.2000
2
⑴ Ñ'12 ⑵ Ñ'42 ⑶ ѾÐ;2¦0; ⑷ Ñ'¶2.9000
3
⑴ 4 ⑵ -13 ⑶ ;9@; ⑷ Ñ0.8000
4
⑴ Ñ'6 ⑵ '6 ⑶ Ñ5 ⑷ 5 ⑸ Ñ®;7!; ⑹ ®;7!;000
5
⑴ '5 ⑵ Ñ'13 ⑶ '24 ⑷ -'20000
6
⑴ 7 ⑵ -2.8 ⑶ -11 ⑷ -17 ⑸ ;7$; ⑹ -;3@;000
7
⑴ 13 ⑵ -8 ⑶ 4 ⑷ -2000
8
⑴ 3a ⑵ 2a ⑶ -5a ⑷ -4a000
9
⑴ < ⑵ > ⑶ < ⑷ < Ⅰ. 제곱근과 실수1.
제곱근의 뜻과 성질
본문 | 8 ~ 16 쪽유형
콕콕
00
10
④00
11
⑤00
12
④00
13
2700
14
③00
15
④00
16
③, ⑤00
17
①00
18
②, ④00
19
②00
20
-300
21
28`cmÛ`00
22
'6300
23
'34`cm00
24
'61`cm00
25
③00
26
④00
27
②00
28
①, ⑤00
29
③00
30
⑤00
31
②00
32
-700
33
⑤00
34
⑤00
35
②00
36
2100
37
②, ⑤00
38
⑤00
39
②00
40
⑤00
41
⑤00
42
②00
43
a-3b00
44
-4a-3b00
45
②00
46
④00
47
③00
48
2a-2c00
49
⑤00
50
③00
51
③00
52
②00
53
600
54
④00
55
14700
56
1500
57
400
58
⑤00
59
③00
60
⑤00
61
④00
62
②00
63
⑤00
64
6100
65
④00
66
⑤00
67
'¶5.9, '11, ¾Ð 625 , 4, '23 본문 | 17 ~ 19 쪽실력
콕콕
00
81
②, ⑤00
82
'600
83
'72 cm00
84
'12 cm00
85
500
86
ㄷ, ㄹ00
87
③00
88
-100
89
500
90
②00
91
800
92
⑤00
93
③00
94
9000
95
④00
96
②00
97
①00
98
②00
99
2x+100
100
2a0
101
③0
102
①0
103
①0
104
9 본문 | 20 ~ 21 쪽서술형
콕콕
0
105
110
106
10
107
-60
108
40
109
a+6b0
110
-2a+2b0
111
90
112
160
113
120
114
50
115
520
116
22 본문 | 24 ~ 28 쪽유형
콕콕
0
123
3개0
124
③0
125
①, ④0
126
④0
127
④0
128
④0
129
ㄱ, ㄷ0
130
④0
131
④0
132
ㄹ0
133
③0
134
50
135
P : -1-'18, Q : 1+'80
136
3-'110
137
③, ⑤0
138
-2+'130
139
④, ⑤0
140
③0
141
③, ④0
142
⑤0
143
③0
144
구간 B0
145
④0
146
ㄷ, ㅁ0
147
⑤0
148
5개0
149
③, ④0
150
②0
151
③0
152
③0
153
⑤0
154
c<a<b0
155
B0
156
'2+'500
68
1100
69
③00
70
⑤00
71
100
72
400
73
④00
74
12개00
75
②00
76
300
77
②00
78
900
79
②00
80
④ 본문 | 23 쪽개념
콕콕
0
117
⑴ 무 ⑵ 유 ⑶ 무 ⑷ 유 ⑸ 무 ⑹ 유0
118
⑴ × ⑵ ◯ ⑶ × ⑷ ◯0
119
⑴ '10 ⑵ -'50
120
⑴ ◯ ⑵ × ⑶ ◯ ⑷ × ⑸ × ⑹ ◯0
121
-3, -'¶7.1, -'5, ¾Ð15 4 , 20
122
⑴ < ⑵ > ⑶ > ⑷ > ⑸ < ⑹ >2.
무리수와 실수
본문 | 29 ~ 31 쪽실력
콕콕
0
157
⑤0
158
①, ⑤0
159
25개0
160
③0
161
③0
162
④0
163
②0
164
5-'120
165
3-p0
166
③0
167
-2-'100
168
①, ④0
169
④0
170
160
171
②, ④0
172
④0
173
①, ④0
174
④0
175
-'20, -'10, '10, '20, 풀이 참조 본문 | 32 ~ 33 쪽서술형
콕콕
0
176
138개0
177
90개0
178
-1+'170
179
1+'100
180
600
181
420
182
8개0
183
5개0
184
4, 2-'50
185
'5+3, -'8-2빠른 정답
95
빠른 정답 본문 | 58 ~ 68 쪽유형
콕콕
0
332
130
333
④0
334
④0
335
40
336
④0
337
②0
338
②0
339
10
340
①0
341
11 250
342
①0
343
④0
344
1 80
345
④0
346
④0
347
70
348
④0
349
⑤0
350
②0
351
170
352
③0
353
④0
354
①0
355
-3210
356
④0
357
⑤0
358
xÛ`-7x-20
359
1 50
360
40
361
①0
362
①0
363
20
364
⑤0
365
④0
366
⑤0
367
110
368
20xÛ`+x-120
369
①0
370
25aÛ`-30ab+18bÛ`0
237
'20
238
3'3`cm0
239
16'3`cmÛ`0
240
4'3`cm0
241
10`cm0
242
6'3`cmÛ`0
243
18540
244
537.30
245
220
246
④0
247
③, ④0
248
④0
249
④0
250
60
251
18'60
252
②0
253
⑤0
254
'¶100
255
00
256
②0
257
280
258
3'6-2'30
259
;3!;0
260
-20
261
80
262
;3$;0
263
③0
264
560
265
⑤0
266
④0
267
②0
268
340
269
①0
270
③0
271
60
272
'20
273
④0
274
①0
275
②0
276
5+15'60
277
③0
278
⑤0
279
50
280
⑴ 3 ⑵ 50
281
④0
282
①0
283
③0
284
9-'30
285
28'6`cm0
286
30
287
13'2`cm0
288
24'3`cmÜ`0
289
150
290
-1+2'20
291
-6-2'50
292
④0
293
④0
294
②0
295
b<a<c 본문 | 38 ~ 49 쪽유형
콕콕
0
199
⑤0
200
⑤0
201
120
202
30
203
-8'70
204
②0
205
6배0
206
'20
207
570
208
④0
209
150
210
4'50
211
②, ⑤0
212
;9@;0
213
③0
214
300
215
③0
216
⑤0
217
④0
218
30
219
'330
220
④0
221
110
222
ㄱ, ㄷ, ㄹ0
223
'2 '50
224
320
225
③0
226
②0
227
③0
228
100
229
518 '20
230
⑤0
231
8'30
232
⑤0
233
;2#;0
234
2'30
235
9'6`cmÛ`0
236
4'2`cm 본문 | 35, 37 쪽개념
콕콕
0
186
⑴ '26 ⑵ '66 ⑶ '6 ⑷ ®;6%; ⑸ 4'21 ⑹ 6'100
187
⑴ '2 ⑵ '5 ⑶ '6 ⑷ 2®;2#;0
188
⑴ 3'3 ⑵ 6'2 ⑶ -4'5 ⑷ -2'170
189
⑴ '20 ⑵ '48 ⑶ -'50 ⑷ -'540
190
⑴ '56⑵ '161
⑶ '1013 ⑷ - '35
0
191
⑴ ®Â 3 25 ⑵ ®Â36 ⑶ -®Â5 49 2 ⑷ -®Â 3 64 ⑸ ®Â63 4 ⑹ -®Â50 360
192
⑴ '5 5 ⑵ -5'6 6 ⑶ '¶1177 ⑷ 2'3 9 ⑸ '¶1015 ⑹ -314 '70
193
⑴ 1.435 ⑵ 1.507 ⑶ 1.533 ⑷ 1.5780
194
⑴ 10.1 ⑵ 13.3 ⑶ 12.0 ⑷ 14.40
195
⑴ 100, 10, 14.14 ⑵ 20, 20, 44.72 ⑶ 100, 10, 0.1414 ⑷ 20, 20, 0.44720
196
⑴ 4'5 ⑵ 10'3 ⑶ '¶10 ⑷ -2'2 ⑸ 2'60
197
⑴ 5'2 ⑵ 6'5 ⑶ -'6 ⑷ '20
198
⑴ '6+'¶10 ⑵ 10'2-'¶10 ⑶ 3-'¶10 ⑷2
'3+2
⑸4
'6
⑹ 4'3 33.
근호를 포함한 식의 계산
본문 | 50 ~ 51 쪽실력
콕콕
0
296
300
297
170
298
;5^;0
299
④0
300
;;ª5¦;;0
301
③0
302
200
303
④0
304
72'3p`cmÜ`0
305
12'5`cm0
306
5'2-70
307
③0
308
③0
309
8'3-130
310
18'2`cm0
311
6+4'¶100
312
47 본문 | 52 ~ 53 쪽서술형
콕콕
0
313
2'3 30
314
'15 20
315
20
316
30
317
90
318
100
319
30
320
20
321
10
322
8 30
323
-1+'60
324
10-7'2 본문 | 57 쪽개념
콕콕
0
325
⑴ ac+2ad+3bc+6bd ⑵ 4xy-8x+3y-6 ⑶ 2xÛ`-xy+x-3yÛ`+y0
326
⑴ aÛ`+2a+1 ⑵ 4xÛ`+4x+1 ⑶ aÛ`-4a+4 ⑷ 9xÛ`-30x+25 ⑸ aÛ`-9 ⑹ 25aÛ`-4 ⑺ xÛ`-2x-15 ⑻ xÛ`+7xy-44yÛ` ⑼ 6aÛ`+11a+4 ⑽ 8xÛ`-22x+150
327
⑴ 1, 1, 10201 ⑵ 3, 600, 9, 9409 ⑶ 50, 50, 2500, 2491 ⑷ '13, '7, 13, 60
328
⑴ '5-2 ⑵ 3+'7 ⑶ 5'2-3'5 ⑷ '10+'6 2⑸ 3-2'2 ⑹ 13+27'30
0
329
⑴ 2xy, -2, 18 ⑵ 4xy, -4, 200
330
⑴ 2xy, 4, 13 ⑵ 4xy, 8, 170
331
⑴ 2, 2, 23 ⑵ 4, 4, 21 Ⅱ. 다항식의 곱셈과 인수분해1.
다항식의 곱셈
BOB중등 3가-정답.indb 95 19. 8. 12. 오후 1:55본문 | 72 ~ 73 쪽
서술형
콕콕
0
445
370
446
-170
447
730
448
240
449
130
450
560
451
60
452
120
453
170
454
400
455
40
456
5 본문 | 88 ~ 89 쪽서술형
콕콕
0
548
220
549
340
550
2, 180
551
2, 500
552
2x+20
553
2x-110
554
220
555
420
556
-20
557
30
558
n=5, 130
559
n=4, 19 본문 | 69 ~ 71 쪽실력
콕콕
0
421
①0
422
250
423
30
424
③0
425
6xÛ`+7x-200
426
③0
427
270
428
3xÛ`-21x-60
429
22xÛ`+86x-260
430
6pxy0
431
②0
432
④0
433
③0
434
①0
435
-10
436
④0
437
23+2'150
438
③0
439
-1+'50
440
170
441
④0
442
②0
443
②0
444
0 본문 | 85 ~ 87 쪽실력
콕콕
0
525
②0
526
①0
527
⑤0
528
40
529
-2a0
530
⑤0
531
210
532
④0
533
2x+100
534
5개0
535
③0
536
120
537
③0
538
⑤0
539
-30
540
-450
541
-110
542
-60
543
20x0
544
4x-60
545
③0
546
60
547
2x+5 본문 | 75, 77 쪽개념
콕콕
0
457
⑴ 3x+12 ⑵ xÛ`+5x ⑶ xÛ`+8x+16 ⑷ xÛ`-6x+9 ⑸ xÛ`+x-6 ⑹ 6xÛ`-13x-50
458
⑴ x, x(x+y) ⑵ 3, xy, y(x-2) ⑶ x+2, (x+2)(x-7) ⑷ 2x-y, xÛ`+3xy0
459
⑴ 3a(x-y) ⑵ 2xy(x+3y) ⑶ x(a+b-cx)0
460
⑴ (x+2)(ab-c) ⑵ (x-y)(x-y-a) ⑶ 3a(x+1)0
461
⑴ (x+2)Û` ⑵ (6x+1)Û` ⑶ (x+5y)Û` ⑷ (x-9)Û` ⑸ (7x-3)Û` ⑹ {x-;4!;}Û`0
462
⑴ 49 ⑵ 25 ⑶ ;4(; ⑷ Ñ16 ⑸ Ñ20 ⑹ Ñ;5@;0
463
⑴ (x+5)(x-5) ⑵ {x+;4!;}{x-;4!;} ⑶ (6x+1)(6x-1) ⑷ (4x+7y)(4x-7y)0
464
⑴ 1, 5 ⑵ -1, 7 ⑶ -4, 3 ⑷ -6, -50
465
⑴ -2x, -4, -4x, 4 ⑵ -x, 9, 9x, 90
466
⑴ (x+3)(x+4) ⑵ (x-2)(x-6) ⑶ (x-3)(x+6) ⑷ (x+2)(x-12)0
467
⑴ 3x, 3x, -1, -x, 3x-1 ⑵ -6x, 2x, -1, -2x, 2x-10
468
⑴ (x+3)(2x+1) ⑵ (x-1)(3x-2) ⑶ (2x+1)(2x-3) ⑷ (2x-3)(5x+9)2.
다항식의 인수분해
⑶⑷⑸⑹⑺0
371
aÛ`-3a-400
372
200
373
③0
374
②0
375
④0
376
4xÛ`-12xy+9yÛ`+4x-6y+10
377
210
378
②0
379
xÝ`+4xÜ`-14xÛ`-36x+450
380
③0
381
50
382
②0
383
③0
384
⑤0
385
1630
386
⑤0
387
20
388
①0
389
4+4'30
390
②0
391
- 4 30
392
②0
393
③0
394
40
395
160
396
80
397
②0
398
⑴ 29 ⑵ 90
399
250
400
40
401
③0
402
③0
403
①0
404
620
405
③0
406
320
407
12+2'70
408
②0
409
⑤0
410
③0
411
Ñ4'20
412
540
413
⑤0
414
⑤0
415
4'110
416
③0
417
②0
418
③0
419
①0
420
50
499
②0
500
30
501
50
502
5x+10
503
⑤0
504
⑤0
505
④0
506
80
507
③0
508
③0
509
70
510
⑤0
511
③0
512
⑤0
513
②0
514
230
515
④0
516
⑴ xÛ`-3x-10 ⑵ (x+2)(x-5)0
517
④0
518
①0
519
③0
520
4x+100
521
2x+10
522
④0
523
②0
524
2x+6 본문 | 78 ~ 84 쪽유형
콕콕
0
469
③0
470
③0
471
③0
472
③0
473
⑤0
474
②0
475
⑤0
476
③0
477
⑤0
478
③0
479
②0
480
180
481
140
482
⑤0
483
10
484
40
485
④0
486
;2(;0
487
③0
488
2x0
489
②0
490
①0
491
110
492
④0
493
⑤0
494
③0
495
②, ④0
496
(x-2)(x+7)0
497
-100
498
-3빠른 정답
97
빠른 정답 본문 | 116 ~ 117 쪽서술형
콕콕
0
732
20
733
20
734
100
735
-20
736
k=-1, x=20
737
k=-;3@;, x=-20
738
x=;4&;0
739
x=40
740
260
741
160
742
120
743
15 본문 | 106 ~ 113 쪽유형
콕콕
0
652
ㄷ, ㅁ, ㅂ0
653
④0
654
-50
655
④0
656
⑤0
657
④0
658
⑤0
659
x=10
660
④0
661
④0
662
-160
663
⑤0
664
①0
665
⑤0
666
110
667
70
668
③0
669
-30
670
⑤0
671
50
672
④0
673
②0
674
⑤0
675
x=1 또는 x=50
676
②0
677
x=;3!;0
678
①0
679
②0
680
④0
681
20
682
⑤0
683
10
684
③, ⑤0
685
3개0
686
①0
687
30
688
⑤0
689
①, ⑤0
690
⑤0
691
a=-;2%;일 때 x=5`, a=1일 때 x=-20
692
③0
693
⑤0
694
;2%;0
695
-;2&;0
696
②0
697
②0
698
-20
699
160
700
④0
701
①0
702
②0
703
30
704
a¾20
705
①0
706
②0
707
⑤0
708
①0
709
;;Á4£;;0
710
360
711
②0
712
-50
713
⑤0
714
④0
715
6 본문 | 114 ~ 115 쪽실력
콕콕
0
716
②0
717
④0
718
②0
719
⑤0
720
⑤0
721
②0
722
②0
723
-20
724
;3!;0
725
①0
726
③, ⑤0
727
②0
728
180
729
370
730
②0
731
③ 본문 | 92 ~ 97 쪽유형
콕콕
0
568
⑤0
569
(a+b)(3a+b)(3a-b)0
570
②, ③0
571
-80
572
④0
573
①0
574
②0
575
2x+10
576
⑤0
577
④0
578
⑤0
579
90
580
②0
581
④0
582
(6x+2y+3)(6x-2y+7)0
583
㉡, -(5x-2)(6x+13)0
584
-260
585
②0
586
③0
587
(x+2)(x-2)(xÛ`-6)0
588
-60
589
③, ⑤0
590
①0
591
④0
592
⑤0
593
③0
594
②, ④0
595
2x0
596
④0
597
①0
598
①, ⑤0
599
00
600
x-y+30
601
③0
602
⑤0
603
10
604
16000
605
①0
606
⑤0
607
③0
608
②0
609
70
610
④0
611
①0
612
⑤0
613
-70
614
-2'3-30
615
①0
616
③0
617
① 본문 | 98 ~ 99 쪽실력
콕콕
0
618
④0
619
②, ④0
620
②0
621
4개0
622
⑤0
623
-80
624
(x-1)(x-2)(x+1)(x-4)0
625
240
626
④0
627
ㄱ, ㄷ, ㅁ0
628
x+y+10
629
②0
630
;1¦0;0
631
⑤0
632
①0
633
150p mÛ` 본문 | 100 ~ 101 쪽서술형
콕콕
0
634
30
635
120
636
2x+2y-20
637
2x-4y-50
638
640
639
540
640
45850
641
180
642
2000
643
22'13+77 본문 | 105 쪽개념
콕콕
0
644
⑴ × ⑵ ◯ ⑶ × ⑷ ◯0
645
⑴ ◯ ⑵ × ⑶ ◯0
646
⑴ x=0 또는 x=1 ⑵ x=-5 또는 x=-2 ⑶ x=-;3$; 또는 x=;3!;0
647
⑴ x=0 또는 x=-7 ⑵ x=-8 또는 x=8 ⑶ x=2 또는 x=3 ⑷ x=-;3!; 또는 x=30
648
⑴ x=5 ⑵ x=;3!; ⑶ x=-;2%;0
649
⑴ x=Ñ'3 ⑵ x=-1Ñ'3 ⑶ x=-2Ñ'20
650
⑴ (x+1)Û`=5 ⑵ (x+2)Û`=7 ⑶ (x-1)Û`=4 ⑷ (x-3)Û`=120
651
⑴ x=2Ñ'6 ⑵ x=-3Ñ2'5 ⑶ x=1Ñ'3 ⑷ x=-2Ñ'2 Ⅲ. 이차방정식1.
이차방정식의 풀이
본문 | 91 쪽개념
콕콕
0
560
⑴ y(x+3)Û` ⑵ a(x+4y)(x-4y) ⑶ 2b(x+1)(x-4) ⑷ xÛ`(x+5)(x-5)0
561
⑴ (x+y+2)Û` ⑵ (x-3y-2)(x-3y+3) ⑶ (3x+5)(3x-1) ⑷ 4(x+1)(x+3)0
562
⑴ b-1 ⑵ x+10
563
⑴ (x+1)(3y+1) ⑵ (x+1)(x-1)(y+1)0
564
⑴ x+7 ⑵ 2a-10
565
⑴ (a+b-4)(a-b-4) ⑵ (x+y-2)(x-y+2)0
566
⑴ 30 ⑵ 900 ⑶ 32000
567
⑴ 400 ⑵ 900 ⑶ 4'3 ⑷ 13.
인수분해 공식의 활용
BOB중등 3가-정답.indb 97 19. 8. 12. 오후 1:55본문 | 138 ~ 139 쪽
서술형
콕콕
0
882
-20
883
20
884
2xÛ`+3x-6=00
885
6xÛ`-24x+2=00
886
-30
887
40
888
80
889
30
890
150
891
12명0
892
100
893
5 본문 | 122 ~ 134 쪽유형
콕콕
0
757
③0
758
③0
759
2'20
760
④0
761
10
762
③0
763
x=-1Ñ'50
764
③0
765
⑤0
766
④0
767
③0
768
x=-40
769
③0
770
④0
771
x=-3Ñ'220
772
④0
773
④0
774
②0
775
⑤0
776
3+'290
777
④0
778
ㄷ, ㄹ0
779
①0
780
10
781
④0
782
③0
783
①0
784
10
785
20
786
x=1 또는 x=40
787
①0
788
②0
789
k<30
790
⑤0
791
⑤0
792
④0
793
①0
794
②0
795
③0
796
-;3%;0
797
②0
798
④0
799
80
800
②0
801
②0
802
⑤0
803
④0
804
60
805
x=-3 또는 x=20
806
10
807
x=-4 또는 x=10
808
x=-2Ñ'190
809
①0
810
40
811
③0
812
-160
813
①0
814
③0
815
8명0
816
①0
817
②0
818
10
819
240
820
260
821
④0
822
200
823
③0
824
6, 8, 100
825
④0
826
⑤0
827
④0
828
;;Á2°;;0
829
④0
830
④0
831
②0
832
4초0
833
3`cm0
834
90
835
⑤0
836
4`cm0
837
8`cm0
838
6`cm0
839
17`cm0
840
②0
841
④0
842
4`cm0
843
(-3+3'2 )`cm0
844
②0
845
③0
846
③0
847
(18+12'3)p`m0
848
③0
849
20
850
8`cmÛ`0
851
17초0
852
2`cm0
853
13`cm0
854
3`cm0
855
2`m0
856
③0
857
4`m 본문 | 135 ~ 137 쪽실력
콕콕
0
858
③0
859
⑤0
860
40
861
②0
862
⑤0
863
40
864
10
865
③0
866
-20
867
②0
868
④0
869
④0
870
-10, 100
871
④0
872
⑤0
873
6명0
874
③0
875
180
876
40`cmÛ`0
877
2초0
878
⑤0
879
3+'50
880
④0
881
16마리 또는 48마리 본문 | 119, 121 쪽개념
콕콕
0
744
⑴ x=-1Ñ2'21 ⑵ x=3Ñ2'21 ⑶ x=-5Ñ6'13 ⑷ x=1Ñ4'33 ⑸ x=11Ñ10'61 ⑹ x=3Ñ6'330
745
⑴ x=-1Ñ'2 ⑵ x=1Ñ'7 ⑶ x=-2Ñ2'10 ⑷ x=4Ñ3'10 ⑸ x=-2Ñ3 '7 ⑹ x=-3Ñ2'110
746
⑴ x=-;4!; 또는 x=1 ⑵ x=2Ñ'6 ⑶ x=;2!; 또는 x=;3!; ⑷ x=5Ñ2'29 ⑸ x=-2Ñ2 '6 ⑹ x=2Ñ'7 ⑺ x=-1 또는 x=10
747
⑴ 0 ⑵ 1개 ⑶ -23 ⑷ 0개 ⑸ 32 ⑹ 2개0
748
⑴ 2개 ⑵ 1개 ⑶ 2개 ⑷ 0개0
749
⑴ -5, 1 ⑵ 2, -7 ⑶ -;2!;, -;2#; ⑷ 2, ;3@;0
750
⑴ xÛ`-2x-3=0 ⑵ xÛ`+4x=0 ⑶ xÛ`-4x+4=0 ⑷ xÛ`-;5#;x-;5@;=00
751
⑴ xÛ`-6x+5=0 ⑵ -2xÛ`-14x-20=0 ⑶ -4xÛ`+4x-1=0 ⑷ 3xÛ`+9x+6=0 ⑸ 6xÛ`-x-1=00
752
⑴ 2+'2 ⑵ -4-'5 ⑶ 6-'10 ⑷ -1+5'30
753
⑴ xÛ`+2x-8=0 ⑵ x=-4 또는 x=20
754
⑴ x+1 ⑵ xÛ`+x-90=0 ⑶ x=9 ⑷ 9, 100
755
⑴ 0 m ⑵ 10초0
756
⑴ xÛ`-14x+40=0 ⑵ x=4 또는 x=10 ⑶ 4`cm2.
이차방정식의 활용
⑶⑷⑸⑹⑺ 본문 | 143, 145 쪽개념
콕콕
0
894
⑴ ◯ ⑵ _ ⑶ ◯ ⑷ _ ⑸ _ ⑹ ◯0
895
⑴ y=700x, _ ⑵ y=6xÛ`, ◯ ⑶ y=xÛ`+4x, ◯ ⑷ y=3x, _0
896
⑴ -1 ⑵ -1 ⑶ 2 ⑷ -;4&;0
897
⑴ 0, 0 ⑵ 아래 ⑶ y, x=0 ⑷ 증가0
898
⑴ 0, 0 ⑵ 위 ⑶ y, x=0 ⑷ 감소0
899
⑴ ㄱ, ㄹ, ㅁ ⑵ ㄴ, ㄷ, ㅂ ⑶ ㄹ ⑷ ㄴ ⑸ ㄱ과 ㅂ0
900
⑴ y=3xÛ`+2 ⑵ y=-;3$;xÛ`-;2!;0
901
⑴ {0, -;2!;}, x=0 ⑵ {0, ;5!;}, x=00
902
⑴ a>0, q<0 ⑵ a<0, q>00
903
⑴ y=3(x+2)Û` ⑵ y=;2!;(x-3)Û` Ⅳ. 이차함수1.
이차함수의 그래프 ⑴
빠른 정답
