SOLUTION: please help me solve: log base 5 (x^2+x+4)=2

Question 241480: please help me solve:
log base 5 (x^2+x+4)=2
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
log base 5 (x^2+x+4)=2
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x^2+x+4 = 5^2
x^2 + x -21 = 0
x = [-1 +- sqrt(1 -4*-21)]/2
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x = [-1 +sqrt(85)]/2 or x = [-1-sqrt(85)]/2
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Cheers,
Stan H.
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