Question

5)
If the roots of the quadratic equation coc? + bx+c=0 are real and equal, then
(A) 62 - 4ac = 0 (B) b2 - 4ac < 0 (C) b2 - 4ac > 0 (D) None​

Answer 1

if the roots r equal then ,

D = 0

•°• b²-4ac = 0