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Which expression represents multiplying (x) by (-3) and then adding (8)?
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Answer and explanation
Correct answer: -3x+8
Multiplying x by -3 gives -3x. Adding 8 afterwards gives the expression -3x+8. In option D, -3 multiplies both x and 8, producing -3x-24, so it is not correct. Exam tip: words such as “then adding” mean that the added number stays outside the multiplication.
Frequently asked questions
What is the correct answer to this question?
-3x+8
Why is this the correct answer?
Multiplying x by -3 gives -3x. Adding 8 afterwards gives the expression -3x+8. In option D, -3 multiplies both x and 8, producing -3x-24, so it is not correct. Exam tip: words such as “then adding” mean that the added number stays outside the multiplication.
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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