Discriminant drill

Exercise and reference answers

Questions

1. Answer

   12

   Question

   For x² + 4x + 1 = 0, what is b² - 4ac?

2. Answer

   1

   Question

   For 2x² + 3x + 1 = 0, what is b² - 4ac?

3. Answer

   0

   Question

   For x² + 6x + 9 = 0, what is b² - 4ac?

Instructions

Work out b² - 4ac, key it in, then press enter.

Explanation