Question

Identify the vertex for the graph of y = 2x2 + 8x - 3.
(2, 21)
(2, 17)
(-2, -11)
(-2, -27)

Answer 1

\(\dfrac{-b}{2a}\) <--- formula

Answer 2

\(\dfrac{-8}{2*2}=\dfrac{-8}{4}=-2\\x=-2\)

Answer 3

plug that into the equation
\(y=2*-2^2+8*-2-3\\2*4-16-3\\8-19=-11\)

Answer 4

so C

Answer 5

dang it i got it wrong in my head

Answer 6

thxs

Answer 7

did you try the formula?

Answer 8

@OregonDuck why thanks?

Answer 9

thanks for the help

Answer 10

for the answer

Answer 11

but it's @HelloKitty17 's question?

Answer 12

yeah i am helping her she is my sis

Answer 13

oooooooooooohhhhhhhhhh

Answer 14

hi

Answer 15

i didn't know that