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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