(lg5)^2+lg2*lg25+(lg2)^2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 10:56:02
![(lg5)^2+lg2*lg25+(lg2)^2](/uploads/image/z/14326610-50-0.jpg?t=%28lg5%29%5E2%2Blg2%2Alg25%2B%28lg2%29%5E2)
(lg5)^2+lg2*lg25+(lg2)^2
(lg5)^2+lg2*lg25+(lg2)^2
(lg5)^2+lg2*lg25+(lg2)^2
原式=(lg5)^2+2*lg2*lg5+(lg2)^2
=(lg5+lg2)^2
=(lg10)^2
=1
(lg5)^2+lg2*lg25+(lg2)^2
=(lg5)^2+lg2*lg5^2 +(lg2)^2
=(lg5)^2+2lg2*lg5 +(lg2)^2
=(lg5+lg2)^2
=[lg(2*5)]^2
=(lg10)^2
=1^2
=1