In which order is the difference of (2x+5) and (x-1) equal to (x+6)?
Answer and explanation
Correct answer: \((2x+5)-(x-1)\)
To find the difference, subtract the second expression from the first: \((2x+5)-(x-1)\). On removing the bracket, \(2x+5-x+1=x+6\). In option B, the order of subtraction is reversed, so it gives \(-x-6\). Exam tip: when removing brackets preceded by a minus sign, change every sign inside the bracket.
Frequently asked questions
What is the correct answer to this question?
\((2x+5)-(x-1)\)
Why is this the correct answer?
To find the difference, subtract the second expression from the first: \((2x+5)-(x-1)\). On removing the bracket, \(2x+5-x+1=x+6\). In option B, the order of subtraction is reversed, so it gives \(-x-6\). Exam tip: when removing brackets preceded by a minus sign, change every sign inside the bracket.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear polynomials.
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