9.9²×9.9×0.2+0.01因式分解
问题描述:
9.9²×9.9×0.2+0.01因式分解
答
题目错了
第一个乘号应该是加号吧
9.9²+9.9×0.2+0.01
=9.9²+2×9.9×0.1+0.1²
=(9.9+0.1)²
=10²
=100