what is the vertex form of the equation

y=x^2+4x-3

Could someone please explain.

2 answers

y = x^2 + 4x - 3
y = x^2 + 4x + 4 - 3 - 4
y = (x+2)^2 - 7
(y+7) = (x+2)^2

the vertex is at (-2,-7)
Thank you.