Question

PLEASE HELP
What is the discriminant of the quadratic equation 2x + 5x2 = 1?

–18
–16
22
24

Answer 1

We know the dicrimant is given by
D = b^2 - 4ac
there fore
.. (2)^2 - 4 (5)(-1)
....===> 4 + 20
=====> 24

there fore here D = 24.....

Answer 2

Hey
here is your answer

____________


first arrange in the form of ax2 + bx + c = 0


so ----》5x2 + 2x - 1 = 0


now using formula
discriminant = b2 - 4ac

and in the question

b = 2 and a = 5 while c= -1

so answer -------



(2)2 -4 (5 * -1)

4 + 20

24


so answer is 24