alyssasimeon alyssasimeon

07-05-2015
Mathematics

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solve by completing the square b^2 + 6b - 16 = 0

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Panoyin Panoyin

07-05-2015

         b² + 6b - 16 = 0
      b² + 8b - 2b - 16 = 0
b(b) + b(8) - 2(b) - 2(8) = 0
   b(b + 8) - 2(b + 8) = 0
      (b - 2)(b + 8) = 0
b - 2 = 0 or    b + 8 = 0
   + 2 + 2 - 8 - 8
   b = 2 b = -8

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