Question

rtex of the quadratic equation: y = 2x2 + 12x − 4.

Answer 1

rtex?

Answer 2

vertex

Answer 3

2(x^2 + 6x-2)=0
x^2+6x-2=0
x = (-6+(36+8)^(1/2) / 2
x= some complex

Answer 4

what is a vertex ?

Answer 5

yes i need coordinates

Answer 6

let the vertex=(x,y)

Answer 7

then x=-b/za, according to y=ax^2+bx+c

Answer 8

x=-b/2a

Answer 9

so the answer is (-3,-22), do you understand?

Answer 10

f'(x)=2(2x+6)=0
x = -3
y = -22

f''(x)=4 >0 hence local minimum
(-3,-22) ??

Answer 11

yes thanks

Answer 12

yes ,the minimum is -22