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Which of the following expressions represents the algebraic identity for the square of the sum of two terms?

Answer and explanation

Correct answer: \(a^2+2ab+b^2\)

\((a+b)^2=(a+b)(a+b)=a^2+2ab+b^2\), so A is correct. In B, the sign of the last term is incorrect. Exam tip: the middle term is always twice the product of the two terms.

Related tags

Algebraic IdentitiesPerfect SquareBinomial SquareClass 9 MathematicsPolynomial ExpansionExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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