中3
因数分解 平方の差_1
次の式を因数分解せよ。
x2-9
(x+3)(x-3)
a2-4
(a-2)(a+2)
a2-25b2
(a+5b)(a-5b)
x2-49y2
(x+7y)(x-7y)
x2-100
(x+10)(x-10)
a2-b2
(a+b)(a-b)
x2-121
(x+11)(x-11)
x2-144y2
(x+12y)(x-12y)
次の式を因数分解せよ。
4x2-9
(2x+3)(2x-3)
16a2-25
(4a-5)(4a+5)
36a2-25
(6a+5)(6a-5)
4x2-49
(2x+7)(2x-7)
9x2-16y2
(3x-4y)(3x+4y)
100a2-9b2
(10a-3b)(10a+3b)
36x2-49y2
(6x-7y)(6x+7y)
49x2-144y2
(7x+12y)(7x-12y)
解答 表示
(x+3)(x-3)
(a-2)(a+2)
(a+5b)(a-5b)
(x+7y)(x-7y)
(x+10)(x-10)
(a+b)(a-b)
(x+11)(x-11)
(x+12y)(x-12y)
(2x+3)(2x-3)
(4a-5)(4a+5)
(6a+5)(6a-5)
(2x+7)(2x-7)
(3x-4y)(3x+4y)
(10a-3b)(10a+3b)
(6x-7y)(6x+7y)
(7x+12y)(7x-12y)