[tex]2\log_{10}x + \log_{10}5 = \log_{10}x^2 + \log_{10}5 = \log_{10}5x^2[/tex]
So the answer is [tex]\log_{10}5x^2[/tex]
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I used the log rules
y*log(x) = log(x^y)
log(x) + log(y) = log(x*y)
these rules apply to any log base (not just base 10).
