The sum of the roots of x² + 6x - 55 = 0 is:

A. 6

B. - 6

C. - 55

To find the roots, we need to factorize the quadratic expression

x² + 6x - 55 = 0

x² + 11x - 5x - 55 = 0

x (x + 11) - 5x - 55 = 0

x (x + 11) - 5 (x + 11) = 0

(x - 5) (x + 11) = 0

Then solve the value of x

x - 5 = 0

x = 5

or

x + 11 = 0

x = - 11

The roots are - 11 and 5

Sum of the roots

sum = - 11 + 5

sum = - 6

The answer is option b