4+12(x-y)+9(x-y)
4+12(x-y)+9(x-y)的平方
4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
4-12(x-y)+9(x+y)^2
因式分解4-12(x-y)+9(x-y)的平方
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
因式分解:25(x+y)²-9(x-y)²;(x+y)²-4(x+y-1).
已知2x+y=4,求代数式[(x+y)2-(x-y)2-2y(x-12
5/12[-4/3(x-y)^3] *(x+y)^2 * (-x-y)^3 * 5/6(y-x)^2
因式分解9(x-y)²+12(x²-y²)+4(x+y)²
分解因式:9(x-y)*2+12(x*2-y*2)+4(x+y)*2
(3x-2y)×(3x+2y)×(9x+4y)