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Which expression represents twice the sum of the square of (x) and (5)?
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Answer and explanation
Correct answer: \(2(x^2+5)\)
First, square \(x\) and add 5 to get \(x^2+5\). Twice this entire sum is \(2(x^2+5)\), so option C is correct. In option A, only \(x^2\) is doubled, not 5. Exam tip: When you read “twice the sum,” put the complete sum inside brackets.
Frequently asked questions
What is the correct answer to this question?
\(2(x^2+5)\)
Why is this the correct answer?
First, square \(x\) and add 5 to get \(x^2+5\). Twice this entire sum is \(2(x^2+5)\), so option C is correct. In option A, only \(x^2\) is doubled, not 5. Exam tip: When you read “twice the sum,” put the complete sum inside brackets.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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