1、(4x²y-2x³)÷(-2x)²
1、(4x²y-2x³)÷(-2x)²
已知:x+y+z=1,x²+y²+z²=2,x³+y³+z³
化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
化简[21x^5y^7-28x^7y^4+7y(2x³y²)²]÷(-7x^5y^4)
试说明代数式 x³y³ - 1/2x²y + y² - 2x³y&su
已知x,y满足x²+y²-4x-6y+13=0,求(-y/x³)³÷(-1/xy
x³y³-x²y²-xy+1
化简并求值:4x ³(-y ³)² -3x 乘(-x)²(-y²)&s
3.计算(4X的四次-6X²+2)(5X³-2X²+X-1)
单项式除以单项式2a²(x-y)³+3a²(y-x)²
函数极限例题(急)急求Y=X³-4X²+2XY-Y²的极限
数学整式除法计算:(1)(7x²y³-8x²y³z)÷8x²y&sup