Question

If b2-4ac = 0 then, what is the value of equal roots of the quadratic equation?

(a) b/2a (b) 2a/b (c) -2a/b (d) -b/2a ​

Answer 1

Answer:

d)

$\frac{ - b}{2a}$

Step-by-step explanation:

w.k.t :

$x = \frac{ - b \frac{ + }{ - } \sqrt{ {b}^{2} - 4ac} }{2a}$

if b²-4ac=0:

x = -b/2a