Question

if the discriminant of the quadratic equation 4x-dx+25=0 is zero then find d​

Answer 1

Answer:

hope it will be helpful for you

Answer 2

Answer:

d = ± 20

Step-by-step explanation:

Value of discriminant = b^2 - 4ac

In the quadratic equation, a = 4, b = -d and c = 25

It is given that the discriminant is zero.

Therefore, (-d)^2 - 4(4)(25) = 0

d^2 - 400 = 0

d^2 - 20^2 = 0

( d + 20 ) ( d - 20 ) = 0

d = -20 or d = 20