Question

Quadratic form of this equation:y = ½(x - 4)2 - 3

Answer 1

@terenzreignz

Answer 2

This isn't a question yet, you know :D

Answer 3

I know I just don't know how to turn the vertex form back into the standard form

Answer 4

Its the vertex form in the question

Answer 5

Oh, well, simple enough ^^
Just expand the square of the binomial

Answer 6

so .5(x-2)(x-2)-3?

Answer 7

Why x-2?

Answer 8

because it adds to -4

Answer 9

No, stay with the actual definition of squaring :D

x^2 = x x

(x-4)^2 = (x-4)(x-4)

Can you expand further?

Answer 10

i don't know at all

Answer 11

FOIL method?

Answer 12

oh so x^2-8x+16

Answer 13

Yes... exactly XD
Now, replace (x-4)^2 with that...
and then just distribute and simplify.

Answer 14

ok so x^2+-4x+13?

Answer 15

no x^2-4x+5

Answer 16

Almost.
You forgot to multiply x^2 with ½ :P

Answer 17

what would it be then .5x^2?

Answer 18

Yup. ^_^

Answer 19

I prefer ½x^2 but whatever floats your boat XD

Answer 20

ok

Answer 21

Now, that wasn't so hard, was it?