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sara1234
Group Title
find all possible rational zeros of the polynomial function f(x) = 4x^3 – 5x^2 + 9x – 6.
I did it and I got +1 +2+ 3+ 6 +1/2 + 3/2 + 1/4+ 2/4+ 3/4+ 6/4
can some one please check my work thanks
 2 years ago
 2 years ago
sara1234 Group Title
find all possible rational zeros of the polynomial function f(x) = 4x^3 – 5x^2 + 9x – 6. I did it and I got +1 +2+ 3+ 6 +1/2 + 3/2 + 1/4+ 2/4+ 3/4+ 6/4 can some one please check my work thanks
 2 years ago
 2 years ago

This Question is Closed

truck Group TitleBest ResponseYou've already chosen the best response.0
Try pluging all values till 6 and 6, it doenst look like this function have rational zeros.
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
All possible rational zeros: p/q where p is the constant and q is the leading coefficient. ±1/4, ±1/2, ±3/4, ±1, ±3/2, ±2, ±3, ±6.
 2 years ago

RolyPoly Group TitleBest ResponseYou've already chosen the best response.0
From wolf. http://www.wolframalpha.com/input/?i=0+%3D+4x%5E3+%E2%80%93+5x%5E2+%2B+9x+%E2%80%93+6.+
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
±2/4 and ±6/4 are already there, but simplified.
 2 years ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.1
can you explain to me what your tallking about please
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
Alright, Do you know the rational root theorem though? How you got the ±1, ±2, etc?
 2 years ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.1
First I found the factors of 6 and 4
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
Yeah. THat's called the rational root theorem. Your answer is generally correct, but all I was saying was that 6/4 = 3/2 and 2/4 = 1/2 which are already there. Those additional ones like I said are unnecessary.
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
So, your answer is correct :)
 2 years ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.1
okay just write out the final answer for me to make sure
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.1
±1/4, ±1/2, ±3/4, ±1, ±3/2, ±2, ±3, ±6
 2 years ago
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