问题
解答题
因式分
(1)16x2-9y2
(2)(x2+y2)2-4x2y2.
答案
(1)原式=(4x)2-(3y)2=(4x+3y)(4x-3y);
(2)原式=(x2+y2+2xy)(x2+y2-2xy)=(x+y)2(x-y)2.
因式分
(1)16x2-9y2
(2)(x2+y2)2-4x2y2.
(1)原式=(4x)2-(3y)2=(4x+3y)(4x-3y);
(2)原式=(x2+y2+2xy)(x2+y2-2xy)=(x+y)2(x-y)2.