解
2(lg5)²+2lg2lg50
=2(lg5)²+2lg2(lg5+1)
=2(lg5)²+2lg2lg5+2lg2
=2lg5(lg5+lg2)+2lg2
=2lg5lg10+2lg2
=2lg5+2lg2
=2(lg5×2)
=2
2【lg5】^2+2lg2•lg50=?
2个回答
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