First thing to do is to move the constant over to the other side of the equals sign. Then we will complete the square on the x terms. We will take half the linear term, square it, then add it to both sides. Our linear term is 4. Half of 4 is 2, and 2 squared is 4. [tex]x^2+4x+4=-1+4[/tex]. In the process of completing the square we have created a perfect square binomial on the left which is [tex](x+2)^2=3[/tex]. A is our answer.
