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Which algebraic identity is appropriate for factorising the expression \(49p^2-64q^2\)?

Answer and explanation

Correct answer: \(a^2-b^2=(a-b)(a+b)\)

This is a difference of two perfect squares: \(49p^2=(7p)^2\) and \(64q^2=(8q)^2\). Hence the identity \(a^2-b^2\) applies. Exam tip: first check whether both terms are perfect squares.

Related tags

Algebraic IdentitiesDifference Of SquaresFactorisationClass 9 MathematicsPerfect SquaresExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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