GCSE Maths Practice: algebraic-proof

Question 9 of 9

Practice applying difference of squares formula.

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

Choose one option:

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

Multiply terms carefully and simplify to check identity.

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

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