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Factor and solve

27a^3-b^3

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
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Using Identity:
 
  (a3 - b3 ) = ( a - b ) ( a2 + ab + b2
 
 
  ( 27 a3 -  b3  ) = [ ( 3a)  - b3 ]  = ( 3a - b ) ( 9a2 + 3ab +b2