Question

Which equation is y=x2+4x−7 in vertex form?

Answer 1

y = (x + 2)^2-11

Explanation:

Change your equation

7 = x^2 + 4

Then do (b/2)^2=____

So, (4/2)^2 = 4

Add 4 to both sides (2 squared is 4)

So the equasion would then be:

4 + 7 = x^2 +4x + 4

Then find what 4 and 4 have in common (your regular b, and then the answer you found after calculating your (b/2)^2)

4x = 2 + 2

4 = 2^2

Then just integrate 2 into your answer: y= (x + 2)^2 - 11

Answer 2

y = (x + 2)² − 11

Explanation:

This is the vertex form