问题
解答题
因式分
(1)ab2+2ab+a
(2)(x2+1)2-4x2.
答案
(1)ab2+2ab+a
=a(b2+2b+1)
=a(b+1)2;
(2)(x2+1)2-4x2
=(x2+1+2x)(x2+1-2x)
=(x+1)2(x-1)2.
因式分
(1)ab2+2ab+a
(2)(x2+1)2-4x2.
(1)ab2+2ab+a
=a(b2+2b+1)
=a(b+1)2;
(2)(x2+1)2-4x2
=(x2+1+2x)(x2+1-2x)
=(x+1)2(x-1)2.