## anonymous one year ago The equation f(x) = 5x2 − 30x + 6 represents a parabola. What is the vertex of the parabola? (−5, 281) (5, −19) (−3, 141) (3, −39)

1. triciaal

standard ax^2 +bx + c vertex a(x-h)^2 + k

2. Nnesha

$\huge\rm \frac{ -b }{ 2a }$ use this formula to find x-coordinate of the vertex then substitute all x's for its value into f(x) equation to find y-coordinate of the vertex

3. triciaal

vertex (h, k)

4. anonymous

what would i input into the formula?

5. Nnesha

$\huge\rm Ax^2+Bx+C$ quadratic equation where a=leading coefficient b=middle term c=constant term

6. Luigi0210

There are two ways to find the vertex.. and since your equation is already in standard form, using $$\large \frac{-b}{2a}$$ would be easier. unless you want to complete the square and use @triciaal 's way

7. anonymous

Oh, okay. Thank you, I will give you an update on how I do :D

8. anonymous

Well, Look at the formula, ax^2 How many x^2 numbers do you have in your equation? bx How many numbers do you have that have x? and c, your only remaing number.