因式分解x2+y2-x2y2-4xy-1;
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
因式分解:1-x2+4xy-4y2=______.
2x2+xy-3y2+x+4y-1因式分解
因式分解:x2-9a2+12a-4;x2y+3xy2-x-3y;1-x2-2xy-y2;3a2+2b-2ab-3a;x2
X2+3xy+y2因式分解
已知xy/x+y=1/3,x2y2/x2+y2=1/5,求xy的值.
多项式2x2y2-2y2+(xy-1)(x-1)2因式分解后还有的因式是
-4x2+3xy+2y2 因式分解怎么解
因式分解:x3+(y-1)x2-2xy-y2
x2-(a+b)xy+aby2 x2+4xy-5y2 x2-5x+3 2x2+xy-y2-4x+5y-6
2x2-xy+3y2因式分解
因式分解:x2-2xy+y2-z2.