A quadratic equation in its generic form can be written as:
ax ^ 2 + bx + c = 0
For this case:
a> 1
For this case what you should do is use the following equation
roots = ((- b) +/- root (b ^ 2-4 * a * c)) / (2 * a)
answer
root1 = ((- b) + root (b ^ 2-4 * a * c)) / (2 * a)
root2 = ((- b) - root (b ^ 2-4 * a * c)) / (2 * a)