问题 填空题

(32-222+(42-322+(52-422+(62-522=______.

答案

原式=[(3-2)(3+2)]2+[(4-3)(4+3)]2+[(5-4)(5+4)]2+[(6-5)(6+5)]2

=52+72+92+112

=276.

故本题答案为276.

单项选择题
问答题 简答题