anonymous
  • anonymous
Calculate the discriminant. x2 + 2x – 2 = 0 A. –8 B. –4 C. 12 D. 8
Mathematics
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SOLVED
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katieb
  • katieb
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Luigi0210
  • Luigi0210
The discriminant is: \(\Large b^2-4ac \)
anonymous
  • anonymous
okay!
pooja195
  • pooja195
List your abc values :) then just plug it in

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anonymous
  • anonymous
i dont know how to do that? @pooja195
pooja195
  • pooja195
\[ax^2+bx+c\]
pooja195
  • pooja195
Remeber this? :)
anonymous
  • anonymous
kinda
pooja195
  • pooja195
anything ^2 is your a value anything with ONLY a plain variable is your b and olny a number is your c
pooja195
  • pooja195
\[x^2 + 2x – 2 = 0\]
anonymous
  • anonymous
ok
Luigi0210
  • Luigi0210
If it helps, I'll color code it for ya: \(\Large \color{red}{1}x^2+\color{blue}{2}x+\color{purple}{-2}=0 \) \(\Large \color{blue}{b}^2+4\color{red}{a}\color{purple}{c} \)
Luigi0210
  • Luigi0210
That should be -4 not +4, sorry about that
anonymous
  • anonymous
okay! @Luigi0210
pooja195
  • pooja195
ok list the values :)

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