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Subjects
Class 9MathematicsNumber SystemsExponentsMedium
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What is the value of (23^2-129)?

Answer and explanation

Correct answer: 400

First evaluate the exponent: \(23^2=23\times23=529\). Then \(529-129=400\), so the correct answer is 400. The value 529 is only \(23^2\); 129 must still be subtracted. Exam tip: evaluate exponents before performing subtraction in such expressions.

Related tags

Number SystemsExponentsInteger OperationsOrder Of OperationsMental ArithmeticMathematicsClass 9 Mcq
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