Question

x2 + 2x
what value completes the square for each expression?

Answer 1

x^2 +2x+(2/2)^2 = 0 +(2/2)^2

x^2 +2x +1^2 = 0+1^2

x^2 +2x +1 = 0+1

(x+1)^2 = 1

(x+1)^2 - 1 = 0