The Discriminant

Helping to embed the meanings of the terms 'two real roots' 'one repeated root' and 'no real roots'. 

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1. what would the discriminant be for a graph with two real roots?

  • b²-4ac = 0
  • b²-4ac + 0
  • b²-4ac > 0
  • b²-4ac < 0
1 of 5

Other questions in this quiz

2. If b²-4ac = 0 then the equation has...

  • two repeated roots
  • No real roots or points of intersection with the x axis
  • one repeated root
  • two real roots

3. 16 has...

  • irrational roots
  • rational roots

4. If b²-4ac < 0 then the equation has...

  • one repeated root
  • No real roots or points of intersection with the x axis
  • two repeated roots
  • two real roots

5. Which of these, found using the discriminant has irrational roots

  • 47
  • 81
  • 37
  • 4

Comments

Hannah

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root 16 = 4 so it has rational roots (I think)!

Samuele1

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root 16 is actually + or - 4 so it can be 1 of 2 answers so this is in fact, irrational and NOT rational m8

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