问题
解答题
分解因式:(1) 3x2-3y2
(2)(x+y)2-10(x+y)+25
答案
(1)3x2-3y2,
=3(x2-y2),
=3(x+y)(x-y);
(2)(x+y)2-10(x+y)+25=(x+y-5)2.
分解因式:(1) 3x2-3y2
(2)(x+y)2-10(x+y)+25
(1)3x2-3y2,
=3(x2-y2),
=3(x+y)(x-y);
(2)(x+y)2-10(x+y)+25=(x+y-5)2.