Advanced MathEasy–MediumPositive value where a square equals a linear expression
Advanced Math practice question
For what value of x greater than 0 is x² equal to 5x + 14?
Answer: 7
x² − 5x − 14 = (x − 7)(x + 2) = 0, so the positive solution is 7.
Common wrong answers
- If you answered 5
- 5 copies the coefficient.
- If you answered 14
- 14 copies the constant.
- If you answered -2
- −2 is the negative solution.
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For x ≠ 0, which expression is equivalent to (x² + 3x) / x? - Easy–Medium
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