(1)求单项式7X²y³、-2X²y³、-3X²y³、2X&
(1)求单项式7X²y³、-2X²y³、-3X²y³、2X&
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
已知多项式-2/3x²y+1/4x的m次方y²-x+1的次数与单项式-3x³y³
已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
不解方程组{2x+Y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
不解方程2x+y=5;x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
已知方程组{2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
不解方程组{2x+y=5,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
观察下列一串单项式的特点:-xy,2x²y,-4x³y,8x的4次方y,-16x的5次方y
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
2x²+1/2y²-2x-3y+5=0,求(2x√9x-y²√x/y³)-(√1