x³-5xy²-7y³+8x²y升幂排列怎么排?4a²b+3ab&su
3a-3b/10ab*25a²b³/a²-b² x²-4y²
x³y³-x²y²-xy+1
3x³+2x-5,4x²-4x-1,a³-3a²b+3ab²-b&su
xy³-8x²y-x³y²-y4次方中,按字母y的降次幂排列为?
例如:a²+b²-c²-4d²-2ab+4cd x²+2xy+y&su
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·
因式分解:m³-2m²-4m+8;x²-2xy+y²-9
7-2xy-3x²y³+5x³y²z-9x⁴y³z&sup
1.计算(-a²b²)÷(-ab²)×(-3ab³)2.先化简再求值「(x-y)
习题15.4 因式分解 5,(3)4xy²-4x²y-y ³ (4)3ax²-3
化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
试说明代数式 x³y³ - 1/2x²y + y² - 2x³y&su