问题
解答题
把下列各式分解因式
(1)-2x3+4x2-2x
(2)a(a-4)+4(a-1)
答案
(1)-2x3+4x2-2x
=-2x(x2-2x+1)
=-2x(x-1)2;
(2)a(a-4)+4(a-1)
=a2-4a+4a-4
=a2-4
=(a+2)(a-2).
把下列各式分解因式
(1)-2x3+4x2-2x
(2)a(a-4)+4(a-1)
(1)-2x3+4x2-2x
=-2x(x2-2x+1)
=-2x(x-1)2;
(2)a(a-4)+4(a-1)
=a2-4a+4a-4
=a2-4
=(a+2)(a-2).