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January 28, 2015

January 28, 2015

Posted by **Sarah** on Tuesday, December 11, 2012 at 5:53pm.

log2 x + log2(x+2) =3

- Precalculus -
**Steve**, Tuesday, December 11, 2012 at 6:59pmlog2 (x(x+2)) = 3

x(x+2) = 2^3 = 8

x^2 + 2x - 8 = 0

(x+4)(x-2) = 0

x=2

throw out x=-4, since logx is not defined for x<0

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