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Which of the following expressions is a perfect-square trinomial and can be factorised using an identity?

Answer and explanation

Correct answer: \(4p^2-12pq+9q^2\)

Here, \(4p^2=(2p)^2\) and \(9q^2=(3q)^2\). The middle term is \(-2(2p)(3q)=-12pq\), so A is \((2p-3q)^2\). In exams, always check the sign of the middle term.

Related tags

FactorisationAlgebraic IdentitiesPerfect Square TrinomialClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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