<PRE><B>Question 168348</B>
y = 7x^2 + 6x -5

In this equation, a = 7, b = 6 and c = -5

We need to find the point (h,k), which is our vertex.

First we find h using: h = -b/2a

h = -6/2(7)

h = -6/14

h = -3/7

We now need to find k.

Plug -3/7 into the function given and simplify.

y = 7(-3/7)^2 + 6(-3/7) - 5

y = 7(9/49) - (18/7) - 5

y = (9/7) - (18/7) - 5

y = -9/7 - 5/1

y = -21/7

y = -3

The vertex is (-3/7, - 3)

Sorry for the wrong answer yesterday.





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