Question

Write the quadratic function in vertex form.

y = x^2 + 8x + 18

Answer 1

Do you know how to complete the square?

Answer 2

(b/2)^2

Answer 3

Yes, so can you apply that here? I'm sure you can...

Answer 4

here are the choices:

y = (x - 4)^2 - 2

y = (x - 4)^2 + 2

y = (x + 4)^2 - 2

y = (x + 4)^2 + 2

Answer 5

Okay, but can you add \(\left(b\over 2\right)^2\) to both sides? Do you know what \(b\) is?

Answer 6

8

Answer 7

So what would \(\left(b\over 2\right)^2\) be?

Answer 8

16?

Answer 9

Yes, so add \(16\) to both sides. :-)

Answer 10

y = (x + 4)^2 - 2

Answer 11

Please show your work.