(-3x²y)(1/3xy²)答案?
(-3x²y)(1/3xy²)答案?
计算:(1).(-2xy²)*(3x²y)²
3x²-4xy+y²
1 3x²+4xy-y²=
若x/y=2,求7x²-3xy+2y²/2x²-3xy+7y²的值 答案是8/3
方程组{x²+y²=10(1)x²-3xy+2y²=0(2)怎么解
越快越好(1)(xy²+3)(xy²+3)-2x(-x+y)(2)(x+2)(x²+4)(
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·
因式分解 x²-3xy+2y²+x-2
1-x²+2xy-y²
已知x/y=3,求x²+2xy-3y²/x²-2xy+y²
已知x/y=3,求x²+2xy-3y²/x²-xy+y²的值