anonymous
  • anonymous
Determine the number of real solutions of x2 + 5x + 8 = 0. Show all your steps. (Hint: Use the discriminant.)
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
a = 2, b = 5, c = 8, put that into the discriminant we get x = -5 + 5^2 -4(2)(8) and since it = 0 it has 1 real number and 1 rational root.
anonymous
  • anonymous
5^2 -4(2)(8) = 25 - 64 = -39
anonymous
  • anonymous
I have no idea what I am doing....

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anonymous
  • anonymous
|dw:1350067445840:dw|
anonymous
  • anonymous
u have to use this formula
anonymous
  • anonymous
I was, just not sure if I was using it right. And idk how to type it out. Which apparently you cannot exactly type it out.
anonymous
  • anonymous
|dw:1350067497678:dw|
anonymous
  • anonymous
|dw:1350067560223:dw|
anonymous
  • anonymous
is \[x ^{2}\] o 2x ??

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