algebra 2

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807

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log10 (r+4) - log10 r = log10 (r+1) I don't understand. It says to solve it.

Guest May 24, 2012

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2⁺⁰ Answers

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log (r+4)/r = log (r+1)

(r+4) = r^2+r

r^2 = 4

r = (+2,-2)

Guest May 24, 2012

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there should be conditions:
r+4>0
r>0
r+1>0 --->r>0

kumold Jun 8, 2012

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