Advanced MathHardSimplifying a quadratic over x
Advanced Math practice question
For x ≠ 0, the expression (x² − 5x)/x is equivalent to x − k, where k is a constant. What is the value of k?
Answer: 5
x² − 5x = x(x − 5), and dividing by x leaves x − 5.
Common wrong answers
- If you answered 0
- 0 cancels only the x².
- If you answered 25
- 25 squares 5.
- If you answered -5
- −5 has the sign wrong.
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