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Which algebraic identity is used to express the difference of two squares as a product of factors?

Answer and explanation

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

The difference of two squares, \(a^2-b^2\), factorises as \((a+b)(a-b)\). Options B and C are square-expansion identities, while D should contain \(-b^2\), not \(+b^2\). Exam tip: for a difference of squares, look for sum and difference factors.

Related tags

Algebraic IdentitiesDifference Of SquaresFactorisationClass 9 MathematicsPolynomial IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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