(lg2)^2+(lg5)^2=?
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(lg2)^2+(lg5)^2=?(lg2)^2+(lg5)^2=?(lg2)^2+(lg5)^2=?(lg2)^2+(lg5)^2=(lg2+lg5)^2-2×lg2×lg5=lg10^2-2lg2
(lg2)^2+(lg5)^2=?
(lg2)^2+(lg5)^2=?
(lg2)^2+(lg5)^2=?
(lg2)^2+(lg5)^2
=(lg2+lg5)^2 - 2×lg2×lg5
=lg10^2 - 2lg2lg5
=1 - 2lg2lg5
计算器知道
(lg5)^2+lg5.lg2=
(lg2)^2+lg2*lg5+(lg5)^2=
2lg5*lg2=
=(lg5)^2+lg2×lg5+lg2 =lg5×(lg5+lg2)+lg2麻烦问一下,这是咋做的
lg2^2+lg2*lg5+lg5=lg2(lg2+lg5)+lg5这个过程中,lg2的平方怎么没了?
lg5*lg2=lg5+2吗?为什么?
lg50+lg2*lg5+(lg2)^2=
lg^2 5+lg2*lg5+lg2=?
lg5*(1+lg2)+(lg2)^2=
lg5+2lg2+（lg2）=?
lg5+2lg2-lg2=什么
(lg2)^2+(lg5)^2=?
(lg5)^2+lg2×lg50=?
(lg5)^2 + (lg2)*(lg50)=
(lg5)^2+lg2*lg50=
2lg2+lg7+lg5=
(lg2)^3+(lg5)^2=
lg5•2lg2=?