计算:6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
3xy+xy+2x²y+yx²+3x²y等于多少
计算:(xy-x²)×x-y/xy
合并同类项:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
x²-3xy-3x²y²+2yx²-y²x 合并同类项
分解因式计算6x³y(x-y)³-4xy³(y-x)²
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
用公式计算(2y-3x)(4y²+6xy+9x²﹚
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)