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Subjects
Class 9MathematicsNumber SystemsExponentsMediumLevel 5
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What is the value of (28^2-284)?

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Answer and explanation

Correct answer: 500

First find the square of 28: \(28^2=28\times28=784\). Then \(784-284=500\). Therefore, the correct answer is 500. Getting 490 may result from an error in subtraction. Exam tip: evaluate the exponent first, then perform the remaining operations.

Related tags

ExponentsNumber SystemsSquaresArithmetic OperationsSubtraction

Frequently asked questions

What is the correct answer to this question?

500

Why is this the correct answer?

First find the square of 28: \(28^2=28\times28=784\). Then \(784-284=500\). Therefore, the correct answer is 500. Getting 490 may result from an error in subtraction. Exam tip: evaluate the exponent first, then perform the remaining operations.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.

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