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anonymous
 5 years ago
f(x)=x^3+6x^29x54 ... find only the rational zeros.
anonymous
 5 years ago
f(x)=x^3+6x^29x54 ... find only the rational zeros.

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0all of the zeroes are rational. I checked a couple integers until one worked. x=3 is a root. So we can factor out (x3). Using division we get (x3)(x^2+9x+18). This factors nicely as (x3)(x+3)(x+6). The zeroes are 3,3,6, which are all rational.
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