问题
计算题
因式分解
(1)x2y﹣4xy+4y;
(2)a3(x+y)﹣ab2(x+y).
答案
解:
(1)x2y﹣4xy+4y,
=y(x2﹣4x+4),
=y(x﹣2)2;
(2)a3(x+y)﹣ab2(x+y),
=a(x+y)(a2﹣b2),
=a(x+y)(a+b)(a﹣b).
因式分解
(1)x2y﹣4xy+4y;
(2)a3(x+y)﹣ab2(x+y).
解:
(1)x2y﹣4xy+4y,
=y(x2﹣4x+4),
=y(x﹣2)2;
(2)a3(x+y)﹣ab2(x+y),
=a(x+y)(a2﹣b2),
=a(x+y)(a+b)(a﹣b).