(-1/2xy²)³-1/6x(xy³)² ,急,
(-2/3X³y+4x²y²-1/2xy²)/(-xy/4) 急
1、xy²+2xy-x(因式分解)
(1)X²+5X+6 (2)Xy²+2Xy+X
(xy^-1)²*(-xy^4)^-1*(-y²x^-1)³等于
﹙4x³y²-2x⁴y²-½xy)÷(-1/2xy) (^人^)
xy²=2,求代数式xy²乘(-x²y²)乘(1/2xy³)²
因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
因式分解:(x+y)³+2xy-2x²y-2xy²-1
计算:(-7x²y)(2x²y-3xy³+xy)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算;[5xy²(x²-3xy)+(3x²y²)³]÷(5xy)
1、计算x²y³÷(xy)²的结果是() A、xy B、x C、y D、xy²