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kayy38 kayy38
  • 29-06-2014
  • Mathematics
Answered

Select the x-coordinate of the vertex of the parabola defined by the function f(x)=-9x^2+7x+8

Verified Answer :

Anonymous Anonymous
  • 30-06-2014

\(f(x)=-9x^2+7x+8\\\\a=-9;\ b=7;\ c=8\\\\x_{vertex}=\frac{-b}{2a}\\\\x_{vertex}=\frac{-7}{2\cdot(-9)}=\frac{-7}{-18}=\frac{7}{18}\)

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konrad509
konrad509 konrad509
  • 30-06-2014

\(x_v=-\frac{b}{2a}\\ x_v=-\frac{7}{2\cdot(-9)}\\ x_v=\frac{7}{18}\\\)

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