16Hit1600
Advanced MathEasy–MediumCounting zeros of a factored function

Advanced Math practice question

The function f is defined by f(x) = x(x − 4). For how many values of x is f(x) = 0?

Answer: 2

x(x − 4) = 0 when x = 0 or x = 4.

Common wrong answers

If you answered 0
There are zeros.
If you answered 1
1 misses x = 0.
If you answered 4
4 is one of the zeros, not the count.

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