Suppose $p(x)$ is a monic cubic polynomial with real coefficients such that $p(3-2i)=0$ and $p(0)=-52$.
Determine $p(x)$ (in expanded form).
9 answers
john is 30 pounds heavier than peter. their total weight 235 pounds.find johns weight
peter is 30 lbs lighter than john. So,
j + j-30 = 235
Odd; I expected an integer answer...
as for the polynomial, who knows? I see no question there. And LaTex doesn't do well here. And p(x) cannot be monic with real coefficients and have a complex root.
j + j-30 = 235
Odd; I expected an integer answer...
as for the polynomial, who knows? I see no question there. And LaTex doesn't do well here. And p(x) cannot be monic with real coefficients and have a complex root.
ah, actually I misspoke.
Since 3+2i is also a root, we have
p(x) = (x-(3-2i))(x-(3+2i))(x-a)
= (x^2-6x+13)(x-a)
So, now just solve for a:
p(0) = -13a = -52
a = 4
p(x) = (x^2-6x+13)(x-4) = x^3-10x^2+37x-52
Since 3+2i is also a root, we have
p(x) = (x-(3-2i))(x-(3+2i))(x-a)
= (x^2-6x+13)(x-a)
So, now just solve for a:
p(0) = -13a = -52
a = 4
p(x) = (x^2-6x+13)(x-4) = x^3-10x^2+37x-52
Thanks so much :)
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Chunky Kong
yes
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ur mom