16Hit1600
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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