GCSE Maths Practice: algebraic-proof

Question 6 of 9

Practice difference of squares formula.

‹ ›

\( \text{Prove that } (x + 2)(x - 2) = x^2 - 4. \)

Choose one option:

\( (x + 2)(x - 2) = x^2 - 4 \) \( (x + 2)(x - 2) = x^2 + 4 \) \( (x + 2)(x - 2) = x^2 - 2x - 4 \) \( (x + 2)(x - 2) = x^2 + 2x - 4 \)

Combine terms carefully to simplify.

Difference of squares identity: \(a^2-b^2=(a-b)(a+b)\).

Enjoyed this question?