SOLUTION: 2log4*5-2log8*5+log80*81-3log2=-1

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Question 945136: 2log4*5-2log8*5+log80*81-3log2=-1
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

2log%284%2A5%29-2log%288%2A5%29%2Blog%2880%2A81%29-3log%282%29=-1




2log%282%29%2B4log%285%29%2B4log%283%29=-1
log%282%5E2%29%2Blog%285%5E4%29%2Blog%283%5E4%29=-1
log%282%5E2%2A5%5E4%2A3%5E4%29=-1

5.3107398866=-1 which is false
so, highlight%282log%284%2A5%29-2log%288%2A5%29%2Blog%2880%2A81%29-3log%282%29%3C%3E-1%29