Question

Calculate the discriminant.



x2 – x + 2 = 0



A.
9


B.


–7


C.
7


D.


–9

Answer 1

Formula for the discriminant is b^2-4ac
ax^2+bx+c is the form of the polynomial, thus a=1, b=-1, and c=2
(-1)^2-4(1)(2)= 1-8=-7 or B

Answer 2

you there??

Answer 3

It should be there?
Just in case:
Formula for the discriminant is b^2-4ac
ax^2+bx+c is the form of the polynomial, thus a=1, b=-1, and c=2
(-1)^2-4(1)(2)= 1-8=-7 or B

Answer 4

yea its there but which answer is it?

Answer 5

The answer is B. -7

Answer 6

thank you i have more. :P

Answer 7

I can take a look (: