SOLUTION: Please help me solve this equation: log2((x^2)+7)=4 (the first 2 is supposed to be small and at the bottom)

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Please help me solve this equation: log2((x^2)+7)=4 (the first 2 is supposed to be small and at the bottom)      Log On


   

Question 106171: Please help me solve this equation: log2((x^2)+7)=4 (the first 2 is supposed to be small and at the bottom)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
solve this equation: log2((x^2)+7)=4
Write in exponential form:
x^2+7 = 2^4
x^2+7 = 16
x^2 = 9
x = 3 or x= -3
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Cheers,
Stan H.