因式分解:4(x+y)²-12(x+y)+9.
因式分解:4(x+y)²-12(x+y)+9.
因式分解(x+y)²(x-y)-(x+y)(x²+y²)
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
x(x-y)-y(y-x)+(x-y)²因式分解
因式分解9(x-y)²+12(x²-y²)+4(x+y)²
(x+y)²-4 x²因式分解
因式分解:4x²(x-y)-2x(y-x)
因式分解:4+12(x-y)+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:X²-Y²-(X+Y)²
因式分解:(x+y)²-(x-y)²
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y