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Card 1 of 22

In the quadratic expression ax2+bx+cax^2 + bx + cax2+bx+c, what is the necessary condition for aaa?

A

If a quadratic has a repeated root, its discriminant must be Δ=0\boxed{\Delta = 0}Δ=0​.

B

50 (in the model's units, e.g., £50,000).

C

a≠0a \neq 0a=0

D

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

Card 1 of 22

Quadratics Flashcards

  1. A Level
  2. /Maths
  3. /Quadratics

22 flashcards on Edexcel A Level Maths Quadratics: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards