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2.2 Completing the Square

In the expansion of (x+a)2(x+a)^2(x+a)2, the coefficient of xxx is always [...]\text{[...]}[...].

A

To solve p2<20p^2 < 20p2<20, the range for ppp is −25<p<25\boxed{-2\sqrt{5} < p < 2\sqrt{5}}−25​<p<25​​.

B

In the expansion of (x+a)2(x+a)^2(x+a)2, the coefficient of xxx is always 2a\boxed{2a}2a​.

C

Factor out 3 from the x2x^2x2 and xxx terms: 3(x2−4x)+53(x^2 - 4x) + 53(x2−4x)+5.

D

In the context of quadratic equations, the roots are the xxx-coordinates where the parabola crosses the xxx-axis.

2.2 Completing the Square Flashcards

  1. A Level
  2. /Maths
  3. /2.2 Completing the Square

Flashcards for Edexcel A Level Maths 2.2 Completing the Square, 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