Question

Calculate the discriminant.

x to the power of 2 - x - 2 = 0

(Points : 4)
9

7

- 7

-9

Answer 1

Use the idea that the discriminant D is D = b^2 - 4ac

Answer 2

In your case, a = 1, b = -1 and c = -2

Answer 3

instead of "x to the power 2", you can simply use "x^2", @Hi! :P

"^" symbol ---> shift+6 on your keyboard.