Question 1085210
x+x^2 = 2x+4
Subtract 2x+4 from both sides:
x^2-x-4 = 0
x^2-x = 4
x^2-x+1/4 = 17/4
(x-1/2)^2 = 17/4
x-1/2 = sqrt(17)/2 or x-1/2 = -sqrt(17)/2
x = 1/2+sqrt(17)/2 or x = 1/2-sqrt(17)/2