Question

Solve x^2 + 4x – 12 = 0 by completing the square.

Answer 1

Move the twelve to the right side.
Add 4 to both sides
Factor the left side
Take the square root of both sides.
Subtract 2 from both sides.

Answer 2

to elaborate on the above response, you add the four because it is (1/2(B))^2 where B is this coefficient: ax^2+Bx+c in a trinomial.