Completion of the square 3 + 4x − 2x2 = a(x + h)2 + k

Value of A, H, and K = ?

I have no idea where to start... any help is appreciated.

Thanks for your time

- 2x^2 + 4x + 3
= - [2x^2 - 4x - 3]
= -( x^2 - 2x - 3/2)
= - (x - 2x + 1) - 3/2 - 1
= -(x - 1)^2 - 5/2

where a = - 1, h = - 1 and k = - 5/2 .. answer//

- 2 ( x² - 2x ) + 3

- 2 ( x² - 2x + 1) + 2 + 3

- 2 ( x - 1) ² + 5

a = - 2
h = - 1
k = 5