问题
解答题
计算与化简 (1)计算
(2)(a2+b2)2-4a2b2. |
答案
原式=
•(a+1)(a-1) (a+3)2
•1 a+1 (a+3)(a-3) a-1
=
;a-3 a+3
(2)原式=a4+b4+2a2b2-4a2b2
=a4+b4-2a2b2.
计算与化简 (1)计算
(2)(a2+b2)2-4a2b2. |
原式=
•(a+1)(a-1) (a+3)2
•1 a+1 (a+3)(a-3) a-1
=
;a-3 a+3
(2)原式=a4+b4+2a2b2-4a2b2
=a4+b4-2a2b2.