A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Given f (x) = 7x^2 + 4x  13, A = sum of roots of f (x) = 0, B = product of roots of f (x) = 0, find ( A + B)^2
anonymous
 4 years ago
Given f (x) = 7x^2 + 4x  13, A = sum of roots of f (x) = 0, B = product of roots of f (x) = 0, find ( A + B)^2

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Won't factor, use quadratic formula

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0not to butt in but you can find the sum of the roots and the produce of the roots without finding the roots

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Alright then, the floor is yours lol

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0you can also prove those formulas using the quadratic formula, but sum of roots of a quadratic \[ax^2+bx+c=0\] \[r_1+r_2=\frac{b}{a}\] produce is \[r_1r_2=\frac{c}{a}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The answer is 289/49. Could you please show me the steps?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0product of the roots, according to satellite's formula is 13/7

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[(\frac{13}{7}\frac{4}{7})^2=(\frac{17}{7})^2=\frac{289}{49}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0could you explain how did you get the A .
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.