Which expression represents the difference between the square of (x) and three times (x)?
Answer and explanation
Correct answer: \(x^2-3x\)
The square of \(x\) is \(x^2\), and three times \(x\) is \(3x\). In the difference between these quantities, the second quantity is subtracted from the first, so the expression is \(x^2-3x\). \(3x-x^2\) reverses the order of subtraction. Exam tip: read “the difference between A and B” as \(A-B\).
Frequently asked questions
What is the correct answer to this question?
\(x^2-3x\)
Why is this the correct answer?
The square of \(x\) is \(x^2\), and three times \(x\) is \(3x\). In the difference between these quantities, the second quantity is subtracted from the first, so the expression is \(x^2-3x\). \(3x-x^2\) reverses the order of subtraction. Exam tip: read “the difference between A and B” as \(A-B\).
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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