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mitchelsewbaran
Group Title
What are the possible rational zeros of f(x) = 2x3 – 4x2 – 7x + 10 ?
± 1/2, ± 1, ± 2, ±5/2 , ± 5, ± 10
± 1, ± 2, ± 5, ± 10
1/2 , 1, 2, 5/2 , 5, 10
1, 2, 5, 10
 one year ago
 one year ago
mitchelsewbaran Group Title
What are the possible rational zeros of f(x) = 2x3 – 4x2 – 7x + 10 ? ± 1/2, ± 1, ± 2, ±5/2 , ± 5, ± 10 ± 1, ± 2, ± 5, ± 10 1/2 , 1, 2, 5/2 , 5, 10 1, 2, 5, 10
 one year ago
 one year ago

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amistre64 Group TitleBest ResponseYou've already chosen the best response.0
this applies to the rational root thrm that takes a pool of options from the factors of the last number divided by the factors of the first
 one year ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.2
the factors of the constant are called p factors of the coefficient of the leading term are q the possible roots are p/q
 one year ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
i still dont understand
 one year ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
you need to be able to determine the first and last numbers to begin with :) can you tell me what they are?
 one year ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
also, proper form has the + tags, so that narrows it down to the first 2 options
 one year ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.2
ok... so the factors of 10 are 1 x 10 or 1 x 10, 2 x 5 or 2 x 5 (called p) the factors of 2 are 1 x 2 or 1 x 2 (called q) so if you use p/q for the roots you will have 1/1, 1/1 1/1 and 1/1, then 10/1, 10/1, 10/1 and 10/1, 1/2, 1/2, 1/2, 1/2 etc... this gives all the possible rational roots
 one year ago
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