Advanced MathHardValue at the midpoint of two zeros
Advanced Math practice question
The function f is defined by f(x) = x² − 6x + 5 and has zeros at x = a and x = b. What is the value of f at the midpoint of a and b?
Answer: -4
The zeros are 1 and 5; their midpoint is 3, and f(3) = 9 − 18 + 5 = −4.
Common wrong answers
- If you answered 0
- 0 is the value at the zeros themselves.
- If you answered 4
- 4 has the sign wrong.
- If you answered 5
- 5 is f(0).
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