Lg5的平方加上lg2乘以lg50怎么算啊?

问题描述:

Lg5的平方加上lg2乘以lg50怎么算啊?
要有解法的,

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