Question

PLEASE HELP! Find b and c so that y=5x^2+bx+c has vertex (9,8).

Answer 1

hint: (h,k) =
where h = -b/(2a)
k = f(h)

Answer 2

go to the site quickmath.com

Answer 3

\(x = -\dfrac{b}{2a}\)

Plug in the given values of
x = 9
a = 5

Then solve for b

Answer 4

Then plug in x = 9, y = 8, and the value of b you found into the original formula and solve for c.

Answer 5

You're welcome

Answer 6

You are my hero @Hero

Answer 7

:)