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?
答
(lg5)²+lg2lg50
=(lg5)²+lg2(1+lg5)
=(lg5)²+lg5lg2+lg2
=lg5(lg5+lg2)+lg2
=lg5+lg2
=lg10
=1