Advanced MathHardMinimum value from factored form
Advanced Math practice question
The function v is defined by v(x) = (x + 4)(x − 2). What is the minimum value of v(x)?
- A. −9Correct
- B. −8
- C. −1
- D. 0
Answer: A. −9
The zeros are −4 and 2; the axis is x = −1, and v(−1) = (3)(−3) = −9.
Why the other answers are wrong
- B. −8
- −8 is v(0), the y-intercept.
- C. −1
- −1 is WHERE the minimum occurs, not its value.
- D. 0
- 0 is the value at the zeros, not the minimum.
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