Question

Write the quadratic function in vertex form.

y = x2 + 4x + 7

Answer 1

this is pre cal

Answer 2

can you complete the square?

Answer 3

Yes.

Answer 4

i forgot how to

Answer 5

alright... x^2 +4x_____)+7
divide 4 by 2 and square it = 4

now factor

(x^2 +4x +4)+7

Answer 6

You've got \[\large y=x^2 +4x+7\]\[\large y=(x^2+4x) +7\]\[\large y= (x^2 +4x+4 -4) +7\]\[\large y= (x+2)^2 +3\]

Answer 7

I mean x^2 +4x +4) +7 -4

Answer 8

Vertex form follows the format \(\large y=a(x-h)^2 +k\) so just match up \[\large y=\color{green}1(x-\color{blue}{(-2)})^2 +\color{blue}3\] and you'll find your vertex and all that other good stuff.

Answer 9

ok

Answer 10

tnks

Answer 11

no problemo.