Advanced MathVery hardConstant left after a quotient minus x
Advanced Math practice question
For x ≠ 1, the expression (x² − 1)/(x − 1) − x is equal to which constant?
Answer: 1
(x² − 1)/(x − 1) = x + 1, and subtracting x leaves 1.
Common wrong answers
- If you answered 0
- 0 assumes the quotient equals x.
- If you answered 2
- 2 keeps the x + 1 and adds 1 again.
- If you answered -1
- −1 subtracts in the wrong order.
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