A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Given that 2 and 5 + 2i are the roots of the equation x^3  12x^2 + cx + d = 0, find the values of c and d. I know that the three roots are 2, 5+2i, and 52i. How do I find the values of c and d?
anonymous
 one year ago
Given that 2 and 5 + 2i are the roots of the equation x^3  12x^2 + cx + d = 0, find the values of c and d. I know that the three roots are 2, 5+2i, and 52i. How do I find the values of c and d?

This Question is Closed

ParthKohli
 one year ago
Best ResponseYou've already chosen the best response.1Expand:\[(x2)(x52i)(x5+2i)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Here's the properly formatted equation. \[x ^{3}12x ^{2}+cx+d=0\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmm, alright. Let me do that. 2 minutes.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Could you explain why we find the quadratic to find the value of c and d? And why do we multiply it with x2? (I know that because x=2 we use x2.) I just don't understand why.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The answer I got: \[x ^{3}12x^{2}+47x54\] So c is 47 and d is 54
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.