Thread: how can i solve this ??

i want the way to solve this equation without using calculator to find value of x
x3 + ax2 + bx + c

Originally Posted by mido22

i want the way to solve this equation without using calculator to find value of x
x3 + ax2 + bx + c

hm... check what did you wrote there ... (first are those x2 x3 or are they just , and where is there equation )

Originally Posted by yeKciM

hm... check what did you wrote there ... (first are those x2 x3 or are they just , and where is there equation )

they are x^3 + (a*x^2) + (b*x) + c =0

Originally Posted by mido22

they are x^3 + (a*x^2) + (b*x) + c =0

if you looking for formula to solve that in that form than.... hm... it's huge if those i assume constants a,b,c were numbers than could be shown how to reduce that equation so it could be solved easier

or you can use Horner scheme , but anyway you need one zero first

Originally Posted by yeKciM

if you looking for formula to solve that in that form than.... hm... it's huge if those i assume constants a,b,c were numbers than could be shown how to reduce that equation so it could be solved easier

or you can use Horner scheme , but anyway you need one zero first

here is the problem link :
https://www.spoj.pl/problems/ROOTCIPH/

what is your idea

Originally Posted by mido22

here is the problem link :
https://www.spoj.pl/problems/ROOTCIPH/

what is your idea

hm.....

try this if helps you : x^3+ax^2+bx+c=0 - Wolfram|Alpha

and here you are how to do cubic polynomial : Solving Cubic Equations


hm.... or because your are writing code for that, maybe it would be easier to test first zero, and than simplify cubic polynomial... as i recall you can use algorithm hm... can't remember right now but as soon as i do i'll write it here (long time passed since i have done any programming )

Originally Posted by yeKciM

hm.....

try this if helps you : x^3+ax^2+bx+c=0 - Wolfram|Alpha

and here you are how to do cubic polynomial : Solving Cubic Equations


hm.... or because your are writing code for that, maybe it would be easier to test first zero, and than simplify cubic polynomial... as i recall you can use algorithm hm... can't remember right now but as soon as i do i'll write it here (long time passed since i have done any programming )

ok take your time but don't forget me