b²+b=2 how to complete the square
b^2 + b = 2b^2 + b + 1/4 = 2 + 1/4(b + 1/2)^2 = 9/4b + 1/2 = (+-) sqrt 9/4b + 1/2 = (+-) 3/2b = -1/2 + 3/2 = 2/2 = 1b = -1/2 - 3/2 = -4/2 = -2
