问题
解答题
因式分
(1)25x2-16y2;
(2)3(a-b)2-6(a-b)c+3c2.
答案
(1)原式=(5x+4y)(5x-4y);
(2)原式=3[(a-b)2-2(a-b)c+c2]=3(a-b-c)2.
因式分
(1)25x2-16y2;
(2)3(a-b)2-6(a-b)c+3c2.
(1)原式=(5x+4y)(5x-4y);
(2)原式=3[(a-b)2-2(a-b)c+c2]=3(a-b-c)2.