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toadytica305
Group Title
List all the real and imaginary zeros of f(x) = x^3+x^2+ 13x  15... 1 is a zero of the function
 2 years ago
 2 years ago
toadytica305 Group Title
List all the real and imaginary zeros of f(x) = x^3+x^2+ 13x  15... 1 is a zero of the function
 2 years ago
 2 years ago

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satellite73 Group TitleBest ResponseYou've already chosen the best response.0
all possible rational roost are number of the form \(\frac{p}{q}\) where \(p\) divides the constant ( in your case 15) and \(q\) divides the leading coefficient, in your case 1
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
so the possibilites are \[\pm1,\pm3,\pm5,\pm15\]
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
since you know 1 is a zero, you can factor it as \[(x1)(\text{something})\] and you can find the something by dividing, by synthetic division or by thinking
 2 years ago

toadytica305 Group TitleBest ResponseYou've already chosen the best response.0
and to find all real and imaginary zeros
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.0
in this case you get \[(x1) (x^2+2 x+15)\] and the second part you can find the zeros using the quadratic formula they are complex
 2 years ago
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