问题
解答题
对下列代数式分解因式:
(1)n2(m-2)-n(2-m);
(2)(x-1)(x-3)+1.
答案
(1)n2(m-2)-n(2-m),
=n2(m-2)+n(m-2),
=n(m-2)(n+1);
(2)(x-1)(x-3)+1,
=x2-4x+4,
=(x-2)2.
对下列代数式分解因式:
(1)n2(m-2)-n(2-m);
(2)(x-1)(x-3)+1.
(1)n2(m-2)-n(2-m),
=n2(m-2)+n(m-2),
=n(m-2)(n+1);
(2)(x-1)(x-3)+1,
=x2-4x+4,
=(x-2)2.