6(x+y)^2+(x^2-y^2)z-12(x-y)^2z^2因式分解
问题描述：
6(x+y)^2+(x^2-y^2)z-12(x-y)^2z^2因式分解
答
6(x+y)^2+(x^2-y^2)z-12(x-y)^2z^2
=[2(x+y)+3(x-y)z][3(x+y)-4(x-y)z]过程呢？十字相乘法2(x+y) 3(x-y)z ×3(x+y) -4(x-y)z