3x³+12x²y+12xy²
因式分解3x-12x³,x²+y²-1-2xy
[-xy/(x-y)²]²×(y²-xy/x)³
3xy²除以(-x分之6y²)³乘以(x分之12y)²
-12x³y⁴÷(-3x²y³)·(-1/3xy)
(3xy)² · (x²+xy-y²)-3xy(3x³y+3x²y
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
x²/xy-x/y
计算:(xy-x²)×x-y/xy
因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+(x+y)²③xy³-
因式分解:3x³-12x²y+12xy²
3x³-12x²y+12xy² 因式分解,
先化简,再求值 4(xy²+3xy-2x²y)-[12xy-3(3x²y-2xy²