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Which statement correctly gives the factors of the expression \(p^2-q^2\)?

Answer and explanation

Correct answer: \((p-q)(p+q)\)

Using \(a^2-b^2=(a-b)(a+b)\), put \(a=p\) and \(b=q\) to get \(p^2-q^2=(p-q)(p+q)\). In \((p-q)^2\), the middle term is \(-2pq\), so it is different. Exam tip: look for a subtraction between two squares.

Related tags

Algebraic IdentitiesQuadratic ExpressionsDifference Of SquaresFactorisationClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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