(16x3y-24x2y+32xy)÷(______)=8x.
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
计算:[x(x2y2-xy)-y(x2-x3y)]÷3x2y.
化简求值:[x(x2y2-xy)-y(x2-x3y)]÷3x2y,其中x=3,y=-1.
若x+y=-1,则x4+5x3y+x2y+8x2y2+xy2+5xy3+y4的值等于( )
已知x、y均为实数,且满足xy+x+y=17,x2y+xy2=66,则x4+x3y+x2y2+xy3+y4=______
先化简,后求值.[2x(x2y-xy2)+xy(xy-x2)]÷x2y,其中x=2013,y=2012.
化简求值:2(x2y+xy)-3(x2y-xy)-4x2y,其中x=-1,y=1.
2(x2y+xy)-3(x2y+xy)-4x2y其中x=-2,y=12
当x-y=1时,那么x4-xy3-x3y-3x2y+3xy2+y4的值是( )
已知x-y=1,求代数式x4-xy3-x3y-3x2y+3xy2+y4.
先化简后求值:4x2y-[6xy-3(4xy-2)-x2y]+1,其中x=2,y=-12
已知x+y=6,xy=4,则x2y+xy2的值为______.