因式分解:y(y+1)(x2+1)+x(2y2+2y+1).
因式分解:x3+(y-1)x2-2xy-y2
3x2+(-3/2x+1/3y2)(2x-3y)因式分解步骤
2x2+xy-3y2+x+4y-1因式分解
因式分解:(1)x2-3xy-10y2+x+9y-2;(2)x3-11x2+31x-21.
已知x-y+1,X2+Y2=25 求(x+y)2和x2-xy+y2的值
已知实数x.y满足(x2+y2)(x2+y2-1)=2,求x2+y2的值
已知2x+y=7,x2+y2=5,求(4x+2y)2-3x2-y2+2(1-y2)的值.
阅读下面例题:把多项式x2-2xy+y2-2x+2y+1因式分解.
分解因式:(1)x2(x-y)+y2(y-x);(2)(x+y)2+64-16(x+y).
整数x、y满足不等式x2+y2+1≤2x+2y,则x+y的值有( )
先化简再求值:-(x2+y2)+[-3xy-(x2-y2)],其中x=-1,y=2.
利用因式分解求x+3y=125(x≠y)时,(x2+2xy-3y2)÷(x-y)的值.