Question

Using the completing-the-square method, rewrite f(x) = x^2 − 8x + 3 in vertex form.

Answer 1

@urbanmorgans @jjwalton04 @Rishi_K

Answer 2

WOULD IT BE: f(x) = (x − 4)2 + 3??

Answer 3

do they have the same product?

Answer 4

these are my choices:
f(x) = (x − 8)2
f(x) = (x − 4)2 − 13
f(x) = (x − 4)2 + 3
f(x) = (x − 4)2 + 16

Answer 5

yes they do @jjwalton04

Answer 6

x23456y−9−12−13−12−9

Answer 7

so, would it be C???

Answer 8

is that the only one with the same product?

Answer 9

not sure...

Answer 10

yes?

Answer 11

then your right'

Answer 12

thanks!

Answer 13

No prob bob

Answer 14

is this answer right>
Which of the following values "completes the square," or creates a perfect square trinomial, for x2 − 12x + ___?

–6
12
36
–36

i think it is C

Answer 15

\[\large (x-4)^2 + 3 = x^2 - 8x + 16 + 3 = x^2 - 8x + 19\]

Doesn't look the same to me

\[\large x^2 - 8x + 3\]

Complete the square...subtract 3 from both sides of the equation

\[\large x^2 - 8x = -3\]

Take half the coefficient of the 'x'...and square it...add that to both sides

\[\large x^2 - 8x + 16 = -3 + 16\]

Rewrite as sum of squares

\[\large (x-4)^2 = 13\]

Finally subtract 13 from both sides to get vertex form

\[\large (x-4)^2 - 13\]

Answer 16

@johnweldon1993 ok, thank you !!!! i would've gotten that wrong then...

Answer 17

i think the answer for your second question is 36 though

Answer 18

@johnweldon1993 am i right?

Answer 19

Correct