Question

find the vertex-

Answer 1

To find the vertex of the equation ax^2 + bx + c

the x-value of the vertex is -b/2a
and you find the y-value by plugging in whatever number you get into the equation and solving

Answer 2

so like 6/3=2^2 thats all i got so far?

Answer 3

You can just memorize that h = –b / (2a) and then plug your value for "h" back into "y =" to calculate "k". If you're allowed to use this formula, you can then more quickly find the vertex, because simply calculating h = –b / (2a) and then finding k is a lot faster than completing the square. Hope this helps!

Answer 4

no

y = ax^2 + bx + c

you have
y = 3x^2 + 6x - 4

a is 3
b is 6
c is -4

the x-coordinate of the vertex is \(\dfrac{-b}{2a}\)

Answer 5

-6/2(3)? so -1 right?

Answer 6

I think so!

Answer 7

Now you can plug that x-value into the equation to find the y-value at that x-value

y = 3x^2 + 6x - 4

y = 3(-1)^2 + 6(-1) - 4

y = ??

Answer 8

um 3-10?

Answer 9

or 3-(-10)?

Answer 10

I believe it is 3-(-10)

Answer 11

waittt its (1,-7) right?

Answer 12

one part at a time

3 - 6 - 4

3 - 10

so yeah it's -7!

Answer 13

thanks bro B)

Answer 14

u really helped

Answer 15

It was my pleasure!

Answer 16

wait where did the 10 come from?

Answer 17

I only did it that way because it was the way you were doing it haha

3 - 6 - 4

-6 -4 = -10

so 3 - 10

Answer 18

ohhh I see thanks bro

Answer 19

otherwise

3 - 6 - 4
-3 - 4
= - 7

Of course, no problem!

Answer 20

so basically like b a c?

Answer 21

what is b a c

Answer 22

3 - 6 - 4

= 3 + (-6) + (-4)

= 3 + (-6 + (-4))

= 3 + (-6 - 4)

= 3 + (-10)

= 3 - 10

= -7

if that makes it easier to see

Answer 23

okay yeah thats better thanks