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1. suppose 5^x = 3. find 5^(2x+3)

 

2. if 9^(x-1) = 7, then what is 3^(2x+3)

 Aug 2, 2020
 #1
avatar+26007 
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1)   ( 5^x )^2   *   (5^3)   = 5^(2x+3)

           (3)^2   * 125 = 9* 125 = 1125

 Aug 2, 2020
 #2
avatar+26007 
+1

2)   (3^2)^(x-1)     *  3^5

        3^(2x-2)       * 3^5      =   3^(2x+3)

               7          * 243      = 1701

 Aug 2, 2020

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