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Which of the following quadratic expressions represents the square of a binomial?

Answer and explanation

Correct answer: \(4x^2-12xy+9y^2\)

A binomial square has the form \(a^2-2ab+b^2\). With \(a=2x\) and \(b=3y\), the middle term is \(-2ab=-12xy\), so A is \((2x-3y)^2\). In B, the last term should be \(9y^2\), not \(6y^2\). Exam tip: verify all three terms.

Related tags

Quadratic ExpressionsAlgebraic IdentitiesBinomial SquarePerfect Square TrinomialClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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