Question

Which of the following is the vertex of the quadratic equation y = 6x2 – 24x + 32?

Answer 1

(–2, –8)

(–2, 8)

(2, –8)

(2, 8)

Answer 2

Take the derivative by the power rule which is just taking the exponent and multiplying the coefficient by it, then subtracting the exponent by 1 to get, y'=12x-24. Since you know the slope is 0 at the vertex, plug that into y' and solve for x, which is 2. Plug 2 back into your original function and find y, simple as that.

Answer 3

so its C or D

Answer 4

?? I'm still confused

Answer 5

i don't know which is the correct answer

Answer 6

ohh wait is it (2,8)?

Answer 7

-2,8

Answer 8

you sure? y=6(x^2-4x)+32
y=6(x-2)^2-24+32
y=6(x-2)^2+8
so, the vertex is (2,8) is B!!!!!

Answer 9

I'm 99% it's -2
but if you're confident with you answer, go with it! :)

Answer 10

*99% sure

Answer 11

ok thanks ! :)