(x-y)^(2m)-(x-y)^(2m-2)因式分解
问题描述：
(x-y)^(2m)-(x-y)^(2m-2)因式分解
还有52xy-8ay+39bx-6ab (x^4+y^4)^2-2x^2 y^2
答
(x-y)^(2m)-(x-y)^(2m-2)=(x-y)^(2m-2)[(x-y)^2-1]=(x-y)^(2m-2)[(x-y+1)(x-y-1)] 52xy-8ay+39bx-6ab =4y(13x-2a)+3b(13x-2a)=(13x-2a)(4y+3b) (x^4+y^4)^2-2x^2 y^2=（x^4+y^4+√2xy)(x^4+y^4-√2xy)