中3
因数分解 乗法公式_1-1
次の式を因数分解せよ。
x2+3x+2
(x+2)(x+1)
x2+5x+4
(x+1)(x+4)
a2+11a+30
(a+5)(a+6)
a2+16a+63
(a+7)(a+9)
x2+7x+12
(x+3)(x+4)
y2+8y+7
(y+7)(y+1)
b2+6b+5
(b+1)(b+5)
c2+6c+8
(c+2)(c+4)
次の式を因数分解せよ。
x2+3xy+2y2
(x+y)(x+2y)
x2-9xy+8y2
(x-y)(x-8y)
a2+12ab+35b2
(a+5b)(a+7b)
a2-14ab+48b2
(a-6b)(a-8b)
x2-17xy+72y2
(x-8y)(x-9y)
a2+15ab+54b2
(a+6b)(a+9b)
x2+10xy+16y2
(x+2y)(x+8y)
a2-12ab+27b2
(a-3b)(a-9b)
次の式を因数分解せよ。
x2-7x-8
(x+1)(x-8)
x2+2x-48
(x-6)(x+8)
a2-2a-35
(a+5)(a-7)
a2-a-72
(a-9)(a+8)
x2+xy-42y2
(x-6y)(x+7y)
a2+7ab-18b2
(a-2b)(a+9b)
x2-6xy-16y2
(x+2y)(x-8y)
a2+11a-12
(a-1)(a+12)
解答 表示
(x+2)(x+1)
(x+1)(x+4)
(a+5)(a+6)
(a+7)(a+9)
(x+3)(x+4)
(y+7)(y+1)
(b+1)(b+5)
(c+2)(c+4)
(x+y)(x+2y)
(x-y)(x-8y)
(a+5b)(a+7b)
(a-6b)(a-8b)
(x-8y)(x-9y)
(a+6b)(a+9b)
(x+2y)(x+8y)
(a-3b)(a-9b)
(x+1)(x-8)
(x-6)(x+8)
(a+5)(a-7)
(a-9)(a+8)
(x-6y)(x+7y)
(a-2b)(a+9b)
(x+2y)(x-8y)
(a-1)(a+12)