16Hit1600
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

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