SOLUTION: What is the x-coordinate of the vertex of a parabola defined by the function f(x) = -7x2 + 9x + 8.

SOLUTION: What is the x-coordinate of the vertex of a parabola defined by the function f(x) = -7x2 + 9x + 8.

Algebra.Com

Question 888584: What is the x-coordinate of the vertex of a parabola defined by the function f(x) = -7x2 + 9x + 8.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
f(x) = -7x^2 + 9x + 8 ---> a = -7, b = 9, c = 8

x = -b/(2a)

x = -9/(2*(-7))

x = 9/14
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