SOLUTION: \log_{2} x + \log_{2} (x+4) = \log

SOLUTION: \log_{2} x + \log_{2} (x+4) = \log_{2} 7

Question 435693: \log_{2} x + \log_{2} (x+4) = \log_{2} 7
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi

Need to be familiar with the Properties of Logarithms











In this example:







 1 = x(x+4)/7     

  7 = x^2 + 4x

 x^2 + 4x - 7 = 0



    

    

       x = 1.3166   |Tossing out negative solution 



  

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