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1.1.4 Algebra and functions

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Why must a≠0a\neq 0a=0 in f(x)=ax2+bx+cf(x)=ax^2+bx+cf(x)=ax2+bx+c?

A

p≤−4\boldsymbol{p\leq -4}p≤−4 or p≥4\boldsymbol{p\geq 4}p≥4

B

Exclude values making a=0a=0a=0, because the equation would not be quadratic.

C

If a=0a=0a=0, the x2x^2x2 term disappears, making the function linear.

D

If Δ>0\boxed{\Delta>0}Δ>0​, a quadratic has two distinct real roots.

Card 1 of 20

1.1.4 Algebra and functions Flashcards

  1. A Level
  2. /Maths
  3. /1.1.4 Algebra and functions

20 flashcards on CCEA A Level Maths 1.1.4 Algebra and functions: the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.

Flashcards