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If two binomials have the same terms, but one has a plus sign and the other has a minus sign between them, which algebraic form is their product equal to?

Answer and explanation

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

In \((a+b)(a-b)\), the middle terms \(-ab\) and \(+ab\) cancel, leaving \(a^2-b^2\). In \((a+b)^2\), a \(+2ab\) term appears. Exam tip: identify same binomials with opposite signs as a difference of squares.

Related tags

Algebraic IdentitiesDifference Of SquaresBinomial ProductsClass 9 MathematicsIdentity RecognitionExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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