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What will be the simplified form of ( (x+8)(x-8) )?

Answer and explanation

Correct answer: \(x^2-64\)

Use the identity \((a+b)(a-b)=a^2-b^2\), where \(a=x\) and \(b=8\). Thus, \((x+8)(x-8)=x^2-8^2=x^2-64\). Option A incorrectly uses a sum instead of a difference of squares. Exam tip: when two binomials have the same terms but opposite signs, apply the difference of squares identity.

Related tags

Algebraic IdentitiesDifference Of SquaresBinomial MultiplicationClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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