Advanced MathMediumInput from an output of a quadratic function
Advanced Math practice question
The function q is defined by q(x) = x² − 5x. For what positive value of x is q(x) = 6?
Answer: 6
x² − 5x − 6 = (x − 6)(x + 1) = 0, so x = 6.
Common wrong answers
- If you answered 1
- 1 gives −4.
- If you answered 3
- 3 gives −6.
- If you answered -1
- −1 is the negative solution.
More Advanced Math questions
- Medium
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