2x³-8x²y+8xy²
(5.2x²y-3.4xy+8x³)+2(2.2xy-4x³-2.3x²y)其中
-4x²y-8xy²+2x²y-3xy²
3x-2xy-8-2x+6xy-x²+6、-x²+2xy-y²-3x²-2xy+
[-xy/(x-y)²]²×(y²-xy/x)³
因式分解:2x³y-8x²y²+8xy³
x³y-2x²y²+xy³
-2xy-4x²y+8三次方y
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
分解因式 -2x²y-12xy²+8xy³=?
分解因式:8(x²-2y²)-x(7x+y)+xy