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Mathematics 15 Online
OpenStudy (anonymous):

Use the Rational Zeros Theorem to write a list of all potential rational zeros f(x) = 13x^3 + 23x^2 + 2x - 26

ganeshie8 (ganeshie8):

factors of -26 : ?

ganeshie8 (ganeshie8):

factors of 13 : ?

OpenStudy (anonymous):

i got this ±1, ± 1/3, ±2, ±13, ±26

ganeshie8 (ganeshie8):

first have those two

ganeshie8 (ganeshie8):

factors of -26 : \(\pm 1, \pm 2, \pm 13, \pm26\) factors of 13 : \(\pm 1, \pm 2, \pm 13\)

OpenStudy (anonymous):

thats the only factors i can do?

ganeshie8 (ganeshie8):

one sec, i have them wrong.

ganeshie8 (ganeshie8):

factors of -26 : \(\pm 1, \pm 2, \pm 13, \pm26\) factors of 13 : \(\pm 1 , \pm13\)

ganeshie8 (ganeshie8):

now we need to take p/q

ganeshie8 (ganeshie8):

p is from factors of -26 q is from factors of 13

OpenStudy (anonymous):

1/2

ganeshie8 (ganeshie8):

p/q : \(\pm1, \pm 1/13, \pm2, \pm 2/13, \pm13, \pm26, \pm2\)

ganeshie8 (ganeshie8):

thats the list of potential rational zeroes

ganeshie8 (ganeshie8):

what we did is this : take each factor of -26, and divide it by

ganeshie8 (ganeshie8):

the each factor of 13

OpenStudy (anonymous):

ohh ok i get it

OpenStudy (anonymous):

ur a goood teacher !

ganeshie8 (ganeshie8):

oh thanks :) good to hear u get it :D

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