因式分解:(1)x2y-4y;(2)x2-4y2+x+2y.
2x2+xy-3y2+x+4y-1因式分解
已知X2+Y2+4=2X+XY+2Y,则X2Y的值是多少?
因式分解:x2-9a2+12a-4;x2y+3xy2-x-3y;1-x2-2xy-y2;3a2+2b-2ab-3a;x2
因式分解:x3+(y-1)x2-2xy-y2
3x2+(-3/2x+1/3y2)(2x-3y)因式分解步骤
化简求值:2(x2y+xy)-3(x2y-xy)-4x2y,其中x=-1,y=1.
已知2x+y=7,x2+y2=5,求(4x+2y)2-3x2-y2+2(1-y2)的值.
2(x2y+xy)-3(x2y+xy)-4x2y其中x=-2,y=12
(X2 -y+1)(X2+1)+X2y+y -X2因式分解
若x2y+xy2=30,xy=6,求下列代数式的值:(1)x2+y2;(2)x-y.
已知(x+3)2+▕x-y+10▏=0求代数式5x2y-【2x2-(3xy-xy2)-3x2】-2xy2-y2的值.
当x=2011,y=2012时,求代数式3x3-4x3y2+3x2y+2x2+4x3y2+2x2y-5x2-5x2y+x