Tuesday 9 January 2018

EXPONENTIALS 5


Simplify (7a)2 - 3a2 - 8a2.     

Solution

= (7a)2 - 3a2   - 8a2.     
  
= 72.a2 - 3a2  - 8a2.                    Since (mn)2 =m2 . n2

= 49a2 - 3a2  - 8a2.         {since the square number of 7 is 49}

= 46a2  - 8a2.

= 38a2     
   
TRY THIS………………


Simplify (8C)2 – 30C2 – 17C2      
  

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