4(x+y)²-9(x-y)²因式分解
x(x-y)-y(y-x)+(x-y)²因式分解
因式分解x²(x-2y)+y²(2y-x)
(x+y)²-4 x²因式分解
因式分解y²-9(x+y)² ,
因式分解:25(x+y)²-9(x-y)²;(x+y)²-4(x+y-1).
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
(X+Y+1)²-(X-Y+1)²因式分解
因式分解:(1)x²+x (2)4x²-9y (3)x²y-4y
因式分解x²y-4y=?
因式分解 X^4(X-y)-y^4(X-y)
因式分解(x³+y³)²-9x²y²(x+y)²
因式分解(x+y)²(x-y)-(x+y)(x²+y²)