求几道初一因式分解4(3x+2y)^2-9(x-y)^2x(a-b)^2-x(3x-wy)^2-(2x-3y)^2
问题描述：
求几道初一因式分解
4(3x+2y)^2-9(x-y)^2
x(a-b)^2-x
(3x-wy)^2-(2x-3y)^2
答
1、27x^2+66xy+7y^2
2、xa^2-(1+2ab)x+xb^2
3、5x^2+(12-6w)x+(w^2-9)y^2
答
4(3x+2y)^2-9(x-y)^2 =(6x+4y+3x-3y)(6x+3y-3x+3y)=3(9x+y)(x+2y)x(a-b)^2-x =x(a-b+1)(a+b-1)(3x-wy)^2-(2x-3y)^2=(3x-wy+2x-3y)(3x-wy-2x+3y)=(5x-3y-wy)(x+3y-wy)