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A day full of math games & activities. Find one near you.
Which answer best describes the complex zeros of the polynomial function? f(x) = x3 - x2 + 6x - 6
The function has one real zero and two nonreal zeros. The graph of the function intersects the x-axis at exactly two locations.
The function has three real zeros. The graph of the function intersects the x-axis at exactly three locations.
The function has two real zeros and one nonreal zero. The graph of the function intersects the x-axis at exactly one location.
The function has one real zero and two nonreal zeros. The graph of the function intersects the x-axis at exactly one location.
Solution:
Given function f(x) = x3 - x2 + 6x - 6
Put x = 1; f(1) = 13 - 12 + 6(1) - 6 = 0
x = 1 is real zeros of given polynomial.
To find remaining roots we can use synthetic division.
1 │ 1 -1 6 -6
│ 0 1 0 6
-------------------
│ 1 0 6 0
Now, quotient is x2 + 6
Take x2 + 6 = 0
x2 = -6
x = ± √(-6) = ±√6i
⇒ The other two roots are imaginary.
Therefore, the function has one real zero and two non-real zeros.
The graph of the function intersects the x-axis at exactly one location.
Which answer best describes the complex zeros of the polynomial function? f(x) = x3 - x2 + 6x - 6
Summary:
“The function has one real zero and two nonreal zeros. The graph of the function intersects the x-axis at exactly one location.”→ best describes the complex zeros of the polynomial function f(x) = x3 - x2 + 6x - 6
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