A community for students.
Here's the question you clicked on:
 0 viewing

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0If your answer's E, when you sub. x=b in, you don't get zero. You should get zero because it's a root of the polynomial.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but isn't (x+2)^2 .. 2 to the left..?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0b is in the positive side of the number line.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Two other things to consider  the shape of the graph is such that the coefficient of x^3 is negative, and there's a double root at a since it just touches the axis and there are no complex roots (if there were, it would look different).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Those three pieces of information should kill four of the five possibilities.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0shouldnt that be to the right

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0or do we count the negative outside the bracket as well?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The negative outside the bracket is allowing you to have a negative coefficient on x^3, which is what you need.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you want me to go through them?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well, A is out because the coefficient of x^3 will be positive.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0C, D, E are out because you have a double root at a, which means the factor containing a should be raised to the power of 2.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ohhh I get it now :) Thanks for your time :)
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.