A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Can anyone plz help me? I'm trying to solve this polynomial equation: x^314x^2+47x18=0
anonymous
 one year ago
Can anyone plz help me? I'm trying to solve this polynomial equation: x^314x^2+47x18=0

This Question is Open

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0ok the highest power is 3 so maximum of 3 roots the constant is 18 so a factor of 18 will be one of the roots (factors of 18 are 1, 2, 3, 6, 9 and the negatives ) don't remember the easy way to do this but in either case when you have a root then (xroot) is a factor in addition when you have a root then f(root) = zero eg if 2 is a root then f(2) = 0 divide by a factor then factorize the quadratic to find the others

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439354933156:dw

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439355454429:dwdw:1439355715418:dw

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439356453827:dw

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439356892355:dw

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0sorry this is so messy and I am all over but hope something helped.

DecentNabeel
 one year ago
Best ResponseYou've already chosen the best response.0\[x^314x^2+47x18=0\quad :\quad x=\frac{5+\sqrt{17}}{2},\:x=\frac{5\sqrt{17}}{2},\:x=9\]

DecentNabeel
 one year ago
Best ResponseYou've already chosen the best response.0\[\mathrm{Factor}\:x^314x^2+47x18:\quad \left(x9\right)\left(x^25x+2\right)\] \[\left(x9\right)\left(x^25x+2\right)=0\] \[\mathrm{Using\:the\:Zero\:Factor\:Principle:}\] \[\mathrm{Solve\:}\:x9=0:\quad x=9\] \[\mathrm{Solve\:}\:x^25x+2=0:\quad x=\frac{5+\sqrt{17}}{2},\:x=\frac{5\sqrt{17}}{2}\]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.