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(5)一般型の展開 2(解答) | 学習日 月 日( ) | ||||
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1 | (x+2y)(x+4y) = x2+6xy+8y2 |
2 | (x+5y)(x+7y) = x2+12xy+35y2 |
3 | (x+4y)(x+y) = x2+5xy+4y2 |
4 | (x+8y)(x+3y) = x2+11xy+24y2 |
5 | (a+3b)(a+2b) = a2+5ab+6b2 |
6 | (a+b)(a+5b) = a2+6ab+5b2 |
7 | (x-2y)(x-6y) = x2-8xy+12y2 |
8 | (x-5y)(x-4y) = x2-9xy+20y2 |
9 | (a-7b)(a-9b) = a2-16ab+63b2 |
10 | (a-b)(a-2b) = a2-3ab+2b2 |
11 | (x+4y)(x-2y) = x2+2xy-8y2 |
12 | (x-y)(x+2y) = x2+xy-2y2 |
13 | (x+y)(x-3y) = x2-2xy-3y2 |
14 | (x-6y)(x-8y) = x2-14xy+48y2 |
15 | (a-7b)(a+4b) = a2-3ab-28b2 |
16 | (a+20b)(a+30b) = a2+50ab+600b2 |
17 | (2x+3)(2x+5) = (2x)2+8(2x)+15 = 4x2+16x+15 |
18 | (3x+1)(3x-2) = (3x)2-(3x)-2 = 9x2-3x-2 |
19 | (5a-1)(5a-2) = (5a)2-3(5a)+2 = 25a2-15a+2 |
20 | (2y-7)(2y+4) = (2y)2-3(2y)-28 = 4y2-6y-28 |
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