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Alex Ar [27]
3 years ago
12

If -3+i is a root of the polynomial function f(x), which of the following must be a root of f(x)?

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
8 0
Use the conjugate of the 1st solution to find the second. which is -3 - i. or a
pochemuha3 years ago
8 0
When dealing with imaginary numbers as roots of a polynomial, you will see that they always occur in conjugates. So the other root that goes with this one is -3 - i.  This will always be the case.
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The graph of part of linear function p is shown on the grid.
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Answer:

A

Step-by-step explanation:

The domain of a function is the span of x-values covered by the graph.

From the graph, we can see that it stretches from x=-7 to x=2.

However, note that at x=-7, the dot is closed (shaded in). In other words, x=-7 <em>is</em> in our domain.

On the other hand, at x=2, the dot is not shaded. So, x=2 is <em>not</em> included in our domain.

Therefore, our domain all are numbers between -7 and 2 including -7 (and not including 2).

As a compound inequality, this is:

-7\leq x

So, our answer is A.

Also note that we use x instead of p(x) because the domain relates to the x-variable. If we were to instead find the range, then we would use p(x).

4 0
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Step-by-step explanation:

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