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

Algebra ->  Exponential-and-logarithmic-functions -> 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      Log On


   

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) About Me  (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.