Question

Calculate the discriminant.

x2 – 2x + 2 = 0

-__- I have no idea what discriminant is?

Answer 1

\[Discriminant = b^2 - 4ac\]

Answer 2

Here
a=1
b= -2
c=2

Answer 3

When you compare a quadratic equation with the standard form, i.e.,
\(ax^2+bx+c=0\)
Then the discriminant 'D' is:
\[D = b^2 - 4ac\]

Answer 4

D= -4

Answer 5

so it's -2 +/- \[\sqrt{4-8}\]

Answer 6

\[-2\pm \sqrt{4-8}\]

Answer 7

there's no radical

its just \(b^2 - 4ac \)

Answer 8

oh. so the two answers are -6 and 4

Answer 9

How?

Answer 10

can you show?

Answer 11

well LOL I did the plus and minus? I dunno that's how I remember the quadratic formula after you solve everything? i'm stupid so LOL

Answer 12

-2 - -6 and -2 + -6

Answer 13

No, They just asked to calculate Discriminant

You don't have to use the entire quadratic formula here

\[Discriminant = b^2 - 4ac = (-2)^2 - 4*1 * 2 = 4 - 8= ?\]

Answer 14

-4 ?

Answer 15

Right! :)