What is the sum of the roots of the quadratic equation 13x22

What is the sum of the roots of the quadratic equation: 1/3(x-2)^2-1/2=5/2

1/3(x-2)^2 - 1/2 = 5/2

(1/3)*(x-2)^2 -1/2 -5/2 = 0 // subtracted 5/2 from both sides

(1/3)*(x-2)^2 -6/2 = 0

(1/3)*(x-2)^2 - 3 = 0

(x - 2)^2 - 9 = 0 // multipied 3 both sides

x² - 4x + 4 - 9 = 0

x² - 4x - 5 = 0

quadratic equation = ax² + bx + c = 0

sum of roots = -b / a

here b = -4 and a = 1

sum of roots = -(-4)/1

sum of roots = 4/1

sum of roots = 4