Question

What is the discriminant of f(x)=-x^2-x+5?

a.-21
b.0
c.2
d.21

Answer 1

The answer is D I hope this helps

Answer 2

Answer: d. 21

Explanation:

The formula to find a discriminant is b^2-4ac.

ax^2+bx+c is the quadratic equation. In your equation, -1 is a, -1 is b, and 5 is c. Now we can plug in the numbers into the discriminant formula b^2-4ac!

(-1)^2-4(-1)(5)=

1-4(-5)

1+20

21

The discriminant is 21.

Hope this helps!