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Class 10

The Quadratic Formula and the Discriminant, Quiz

Five questions on the quadratic formula and the discriminant. Pick one answer for each.

5 questions, one mark each. 3 to pass. Suggested time: 10 minutes. Your answers are not recorded.

  1. What is the discriminant of 2x2−3x−5=02x^2 - 3x - 5 = 0?
  2. Solve x2+4x+1=0x^2 + 4x + 1 = 0 using the quadratic formula.
  3. What is the nature of the roots of 9x2−12x+4=09x^2 - 12x + 4 = 0?
  4. How many real roots does x2+2x+5=0x^2 + 2x + 5 = 0 have?
  5. Find kk if kx2−8x+4=0kx^2 - 8x + 4 = 0 has equal roots.
Unanswered questions are marked wrong.

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