问题
解答题
因式分解
(1)ax3y+axy3-2ax2y2
(2)x2(x-y)+(y-x)
答案
(1)ax3y+axy3-2ax2y2=axy(x2+y2-2xy)=axy(x-y)2 .
(2)x2(x-y)+(y-x)=(x-y)(x2-1)=(x-y)(x+1)(x-1).
因式分解
(1)ax3y+axy3-2ax2y2
(2)x2(x-y)+(y-x)
(1)ax3y+axy3-2ax2y2=axy(x2+y2-2xy)=axy(x-y)2 .
(2)x2(x-y)+(y-x)=(x-y)(x2-1)=(x-y)(x+1)(x-1).