Question

Help?

Answer 1

What are the coordinates of the vertex for f(x) = x2 + 6x + 13?

Answer 2

Pleasee? Ill give metals!

Answer 3

@layers @bass53 @highschoolmom2010 @emo<3girl @hotchillerae21

Answer 4

do u want calculus way or algebra way?

Answer 5

Take the derivative of the original function.

f'(x) = -2x + 6

Make f'(x) = 0.

0 = -2x + 6

Solve for x.

x = 3

Substitute the value of x into the original function and solve for f(3), which is 0. Choice C. Hope that helps!

Algebra way:

f(x) = -x² + 6x - 9

Use the vertex formula:

x = -b/2a
ax² + bx + c

Make..

a = -1
b = 6

Substitute that to the vertex formula and substitute the value of x in the original function to determine for y. You get the same answer as I followed my calculus way.

Answer 6

the first way was the calculus

Answer 7

Thanks so much! Would the answer be (3, 4) then? @layers

Answer 8

yep

Answer 9

Ok :)