Question

Calculate the discriminant.

x^2 + 2x – 2 = 0

Answer 1

I got -4 , and I was wrong :(

Answer 2

What are you using for the formula for the discriminant, and what are you using for your values of \(a,b,c\)?

Answer 3

b^2 -4ac
b=2, a=1, c=2

Answer 4

well, one of those is not correct.

Compare your equation:
\[x^2+2x-2 = 0\]\[ax^2+bx+c=0\]

Answer 5

The -2 and +C ?

Answer 6

right. c = -2, not c = 2

Answer 7

So that's were I got it wrong. Thank you :)

Answer 8

what's your new, improved answer?

Answer 9

12

Answer 10

very good!