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Discriminant of Quadratic Equation

Question

Find out if the following quadratic equation has two distinct roots.

  1. x2 – 5x – 1
  2. 5x2 + 2
  3. x2 + 10x + 25

 

Answer

  1. Yes
  2. No
  3. No

Note:
If b2-4ac is

Results Meaning
<0 no real roots
=0 two equal roots
>0 two distinct roots

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