Pre Calc
posted by Meredith
ln (x^2 +x12)=3ln2

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ln (x^2 +x12)=3ln2
ln (x^2 +x12)=ln2^3
ln (x^2 +x12)=ln8
x^2+x12=8
x^2+x20=0
Factor or use the quadratic formula to solve for x.
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