Revise how the discriminant of a quadratic equation can be used to find the number and nature of roots. BBC Bitesize Scotland SQA National 5 Maths revision.

Let K be a number field and d K the absolute value of the discriminant of K/ℚ. We consider the root discriminant $ {\mathrm {d}}_ {\mathrm {L}}^ {\frac {1} { [\mathrm {L}:\mathrm {\mathbb {Q}}]}}$ of ...

Revise using the discriminant to determine the number of roots National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.