Complete the square: x^2+2x=4
What's the completed square of: x^2+2x=4. . It doesn't contain a
perfect square trinomial, but it could if you added the correct
number to both sides.heart Thank you
x^2 + 2x = 4
Add the square of one-half the co-efficient of x.
x^2 + 2x + 1 = 4 + 1
(x + 1)^2 = 5
x + 1 = sqrt 5
x + 1 = 2.236 and x + 1 = -2.236
x = 2.236 - 1 and x = -2.236 - 1
x = 1.236 and x = -3.236