Question

PLEASE HELP ME OUT!​

Answer 1

A.f(x) = 2x² + x - 1

Explanation:

possibility Answer : A.f(x) = 2x² + x - 1

a = 2

b = 1

c = -1

axis of symetry : -b/2a

with equation A,is obtained(with substitution):

-b/2a = -1/2(2) = -1/4 (proven)

-1/4 = -1/4 (proven)

so Answer is A

Answer 2

SEE:

So I typically use this formula and this is an easy way to find the axis of symmetry: -b/2a,

-b is the x and a is the first coefficient in this equation:

PLAN:

Applying this all together check each equation to see if the axis of symmetry is 1/4 and that would be

DO:

-1/2(-2) = -1/-4 or 1/4

The first option as we can see is not correct

Moving onto the second...

-b/2a

-(-1)/2(2)

1/4

Second option is not correct

Third choice

-b/2a

-1/2(2)

-1/4

This option as we can see is correct.

ANSWER:

Our answer here would be
`x^2+2x-1`