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Oksi-84 [34.3K]
3 years ago
5

A third degree polynomial equation with rational coefficients that has roots -4 and 2+i

Mathematics
1 answer:
White raven [17]3 years ago
8 0
If one of the roots is 2+i, another must be 2-i.  We can express this polynomial as (x+4)(x-2-i)(x-2+i).  This expands to x^3-11x+20.
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2 years ago
Read 2 more answers
Line A: y=-1/2x+3
sashaice [31]
A) For the equation y=- \frac{1}{2}x+3, the slope is - \frac{1}{2}.
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For the solution, set y=- \frac{1}{2}x+3 equal to y=2x-4, so it would be put together like this:
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So your answer is -4.667.
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