SOLUTION: Find the polynominal using real coefficents. Degree 4; zeros ;2 multiplicity 2,4i I got x^4-4x^3-3x^2-40+208 but it is wrong. I am confused can someone please help?

Question 292116: Find the polynominal using real coefficents. Degree 4; zeros ;2 multiplicity 2,4i
I got x^4-4x^3-3x^2-40+208 but it is wrong. I am confused can someone please help?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Find the polynominal using real coefficents. Degree 4; zeros ;2 multiplicity 2,4i
I got x^4-4x^3-3x^2-40+208 but it is wrong. I am confused can someone please help?
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Complex roots come in conjugate pairs, so -4i is also a root.
If you mean the multiplicity of the the 2 root is 2:
(x-2)*(x-2)*(x+4i)*(x-4i)
=
=

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