x^2+ax-y^2+ay因式分解

问题描述:

x^2+ax-y^2+ay因式分解

(x^2-y^2)+(ax+ay)=(x+y)(x-y)+a(x+y)=(x-y+a)(x+y)

一三项 二四项分别结合x^2+ax-y^2+ay=(x^2-y^2)+(ax-ay)=(x+y)(x-y)+a(x-y)=(x+y+a)(x-y)

x^2-y^2=(x+y)(x-y)
ax+ay=a(x+y)
所以x^2+ax-y^2+ay因式分解:(x-y+a)(x+y)

x^2+ax-y^2+ay
= x^2-y^2 + a(x+y)
= (x+y)(x-y) + a(x+y)
= (x+y)(x-y+a)