A quadratic equation is shown: x2 + 18x + 76 = 0 Which of the following is the first correct step to write the above equation in the form (x − p)2 = q, where p and q are integers?
a x2 + 18x + 76 + 9 = 0 + 9
b x2 + 18x + 76 + 5 = 0 + 5
c x2 + 18x + 76 − 5 = 0 − 5
d x2 + 18x + 76 − 9 = 0 − 9