2(2X-3Y)-(3X 2Y 1)怎样化简
化简求值.(x-2y分之4xy 再加+x)除以4x³-x²y分之x²+4xy+4y
分式0.2x-y/-x怎样化简分子和分母都不含负号
(x-y)³+9(x-y)-6(x-y)²
(x-y)³(x-y)²(y-x)等于多少
化简求值答案(x³-2y³-3x²y)-[3(3x³-2y³)-4x&
请问方程x^2-xy+y^2+x-y-1=0是哪种曲线?怎样化简?怎么求对称轴?
化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=
化简二次根式:√x³+2x²y+xy²(x≥0,y≥0)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²