(x+2)-(x-1)(3x-2y)²
1、x(x-y)(x+y)-x(x+y)^2
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
(1)(x^2/x)-y-x-y
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
(3)(4x-2y)-[5x-(8y-2x-y)]+x (4)-(2x²-3x-1)-2(x²-3x
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
(x-y)X(2x-2y)²X(3x-3y)²
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(