(X-1/2y-1)(x-1/2y+1)-(x-1/2y-1)² 运用初二知识化简.
1、x(x-y)(x+y)-x(x+y)^2
运用乘法公式计算:(1)(x-y)(x+y)-(2x-y)²
(1)(x^2/x)-y-x-y
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
运用乘法公式(x+y+1)(x+y-1)(2x-y-3)²(2x-y-3)³【(x+2)(x-2)】
(1)(x+y)^2-(x-y)^2
1、(x-2y)(x+y)
y(x + y + 1) dx + (x + 2y) dy = 0:运用正合方程式求解
化简求值 【2x²-(x+y)(x-y)][(x+y-1)(x-y+1)+1-2y],其中x=-1,y=-2
初二数学通分问题2x+6y/x—3y和x/x—9y²和1/x²6xy+9y²
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(