Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

Synthetic Division f(x)=3x^3 -4x^2- 13x-6 watch

    • Thread Starter
    Offline

    14
    ReputationRep:
    I got (x+1)(-x^2-3x-6) as the answer. But the right answer is f(x)=(x+1)(x-3)(3x+2). Why?
    Offline

    11
    ReputationRep:
    (Original post by Airess3)
    I got (x+1)(-x^2-3x-6) as the answer. But the right answer is f(x)=(x+1)(x-3)(3x+2). Why?
    Without seeing more working it's tricky to pinpoint exactly where you went wrong.
    However, clearly when you factor (x+1) out of the cubic 3x^3-4x^2-13x-6 your leading term in the quadratic needs to be 3x^2.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 4, 2015
Poll
Do you like carrot cake?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.