化简 (lg5)^2+(lg2)lg50

分类: 作业答案 • 2023-01-14 11:46:42

问题描述：

答

(lg5)^2+(lg2)lg50
=(lg5)^2+(lg2)lg5*10
=(lg5)^2+(1-lg5)(lg5+1)
=(lg5)^2+[1-(lg5)^2]
=1