[lg5]的平方+lg2*lg50如何变形?

分类: 作业答案 • 2022-06-03 18:33:09

问题描述：

答

(lg5)² + lg2×lg50
= (lg5)² + lg2×(lg5+lg10)
= (lg5)² + lg2×lg5+ lg2×1
= lg5×(lg5 + lg2) + lg2
= lg5 + lg2
= lg10
= 1