What is the vertex form of the equation?

y = x2 + 4x – 3

a. y = (x – 2)2 – 7
b. y = (x + 2)2 – 7
c. y = (x – 2)2 + 7
d. y = (x + 2)2 + 7

We need to write the equation in its vertex form so we have to know the general equation for the vertex form. It is written as:

y = (x - h)^2 + k

where h and k represents the point of the vertex.

We go as follows:

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

Therefore, the correct answer from the choices is option B.

Where are the functions?