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2.4 The Discriminant

For a quadratic equation ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0, the discriminant is given by the expression [...]\text{[...]}[...].

A

Δ<0\Delta < 0Δ<0

B

Only if the question specifies kkk must be a positive constant.

C
  • a=1a = 1a=1
  • b=2n−1b = 2n-1b=2n−1
  • c=n+2c = n+2c=n+2
D

For a quadratic equation ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0, the discriminant is given by the expression b2−4ac\boxed{b^2-4ac}b2−4ac​.

2.4 The Discriminant Flashcards

  1. A Level
  2. /Maths
  3. /2.4 The Discriminant

Flashcards for Edexcel A Level Maths 2.4 The Discriminant, covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 20 cards, matched to the Edexcel A Level Maths (9MA0) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.

Flashcards