作业帮lg²2+lg50+lg2*lg5怎么解答（步奏
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lg²2+lg50+lg2*lg5怎么解答（步奏
lg²2+lg50+lg2*lg5怎么解答（步奏
lg²2+lg50+lg2*lg5怎么解答（步奏
lg²2 + lg50 + lg2*lg5
= lg²2+ lg2*lg5 + lg50
= lg2 * ( lg2+ lg5) + lg50
= lg2 * lg(2*5) + lg50
= lg2 * lg10 + lg50
= lg2 + lg50
= lg(2*50)
= lg100
= lg10²
= 2