SOLUTION: Solve the following equation for x: log2(x + 7) + log2(x + 8) = 1 Note: Be sure to plug any solutions back into the original equation; if they don't work (e.g., you're forced

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Question 886564: Solve the following equation for x:
log2(x + 7) + log2(x + 8) = 1
Note: Be sure to plug any solutions back into the original equation; if they don't work (e.g., you're forced to take the logarithm of a negative number, which is not possible), discard that solution.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Solve the following equation for x:
log2(x + 7) + log2(x + 8) = 1
Note: Be sure to plug any solutions back into the original equation; if they don't work (e.g., you're forced to take the logarithm of a negative number, which is not possible), discard that solution.


x = - 6.  

x = - 9 is EXTRANEOUS. 

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