七年级数学题(x-y)³ ×(x-y)²×(y-x)
七年级数学题(x-y)³ ×(x-y)²×(y-x)
已知x,y满足x²+y²-4x-6y+13=0,求(-y/x³)³÷(-1/xy
数学整式除法计算:(1)(7x²y³-8x²y³z)÷8x²y&sup
(x+y)²-(x³+y³)÷(x+y)
化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
x³y³-x²y²-xy+1
有这样一道计算题:“计算(2x³-3x²y-2xy²)-(x³-2xy²
化简并求值:4x ³(-y ³)² -3x 乘(-x)²(-y²)&s
已知代数式2(x²+ax-y)-2(bx²+3x)-5y-1的值与X无关求2(a³-2b&
(x-y/x+2y)³
1已知X-Y=XY=3求(X+Y)²及X³-Y³的值
说明理由(5x³-7x³y+3x³y)+2x³-(-7x³y+3x&s