问题
计算题
因式分解
(1)ax3y+axy3﹣2ax2y2
(2)x2(x﹣y)+(y﹣x)
答案
解:
(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)
解:
(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).