问题
解答题
计算:[(a+2b)2-(a+2b)(a-2b)+2b(a-2b)]÷2b.
答案
[(a+2b)2-(a+2b)(a-2b)+2b(a-2b)]÷2b,
=[a2+4ab+4b2-(a2-4b2)+2ab-4b]÷2b,
=(6ab+4b2)÷2b,
=3a+2b.
计算:[(a+2b)2-(a+2b)(a-2b)+2b(a-2b)]÷2b.
[(a+2b)2-(a+2b)(a-2b)+2b(a-2b)]÷2b,
=[a2+4ab+4b2-(a2-4b2)+2ab-4b]÷2b,
=(6ab+4b2)÷2b,
=3a+2b.