CLASS10 · Mathematics · Quadratic Discriminant — Gap Fill

Exercise and reference answers

Missing parts

1. Answer

   b² − 4ac

   Choices

   1. a² − 4bc
   2. b² − 4ac
   3. c² − 4ab
   4. 4ac − b²

2. Answer

   0

   Choices

   1. 0
   2. 1
   3. −1
   4. positive

Complete the statement

For ax² + bx + c = 0, the discriminant D = {0}. The roots are real and equal when D = {1}.

Instructions

Fill the discriminant formula and equal-roots condition.