SOLUTION: if 2^a=3 then 8^a=?

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Question 536039: if 2^a=3 then 8^a=?
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!
  
 = 3

Cube both sides:

 = 

Use the rule of exponents  =  and replace 3³ by 27

 = 27

Use that same rule of exponents in reverse:  = 
 
 = 27

Replace 2³ by 8

 = 27

Edwin
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