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Subjects
Class 9MathematicsNumber SystemsExponentsHardLevel 4
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What is the value of (21^2+22^2)?

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Answer and explanation

Correct answer: 925

First calculate the squares: 21^2 = 441 and 22^2 = 484. Therefore, 21^2 + 22^2 = 441 + 484 = 925, so option B is correct. In an exam, calculating each power separately before adding helps avoid arithmetic errors.

Related tags

ExponentsNumber SystemsSquaresArithmetic Operations

Frequently asked questions

What is the correct answer to this question?

925

Why is this the correct answer?

First calculate the squares: 21^2 = 441 and 22^2 = 484. Therefore, 21^2 + 22^2 = 441 + 484 = 925, so option B is correct. In an exam, calculating each power separately before adding helps avoid arithmetic errors.

Which subject and chapter does this question cover?

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

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  5. 5If (x=\sqrt{3}) then what is (x^2+x^2)?
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  7. 7What is the value of (2^3)?
  8. 8What is the value of (5^2)?
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