Mark the Correct alternative in the following:
If the difference of the roots of is unity, then
Difference of the roots
1
p2 – 4q = 1
p2 – 4q + 4q2 – 4q2 = 1
p2 + 4q2 = 1 + 2(2)(q) + (2q)2
p2 + 4q2 = (1 + 2q)2