lg4+lg9+2根号下(lg6)²-lg36+1=?
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![lg4+lg9+2根号下(lg6)²-lg36+1=?](/uploads/image/z/556245-45-5.jpg?t=lg4%2Blg9%2B2%E6%A0%B9%E5%8F%B7%E4%B8%8B%EF%BC%88lg6%EF%BC%89%26%23178%3B-lg36%2B1%3D%3F)
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lg4+lg9+2根号下(lg6)²-lg36+1=?
lg4+lg9+2根号下(lg6)²-lg36+1=?
lg4+lg9+2根号下(lg6)²-lg36+1=?
lg4+lg9=lg36 (lg6)²-lg36+1=(lg6-1)^2 2根号下(lg6)²-lg36+1=2(1-lg6) lg4+lg9+2根号下(lg6)²-lg36+1=lg36+2-lg36=2
=2lg2+2lg3+2(1-lg6)
=2