问题
解答题
分解因式:
(1)4x2-9y2
(2)4a2(x-y)+b2(y-x)
答案
(1)原式=(2x+3y)(2x-3y);
(2)原式=4a2(x-y)-b2(x-y)
=(x-y)(4a2-b2)
=(x-y)(2a+b)(2a-b).
分解因式:
(1)4x2-9y2
(2)4a2(x-y)+b2(y-x)
(1)原式=(2x+3y)(2x-3y);
(2)原式=4a2(x-y)-b2(x-y)
=(x-y)(4a2-b2)
=(x-y)(2a+b)(2a-b).