问题
解答题
分解因式:
(1)a3-a;
(2)(x+y)2-12(x+y)+36.
答案
(1)a3-a
=a(a2-1)
=a(a+1)(a-1);
(2)(x+y)2-12(x+y)+36
=(x+y)2-2•(x+y)•6+62
=(x+y-6)2.
分解因式:
(1)a3-a;
(2)(x+y)2-12(x+y)+36.
(1)a3-a
=a(a2-1)
=a(a+1)(a-1);
(2)(x+y)2-12(x+y)+36
=(x+y)2-2•(x+y)•6+62
=(x+y-6)2.