Turn on thread page Beta
    • Thread Starter
    Offline

    6
    ReputationRep:
    Hi, does anyone know how to find b and c in the equation y=x^2+bx+c if i know it intersects the points (9,6) and (8,-7)?
    • Thread Starter
    Offline

    6
    ReputationRep:
    anyone?
    Offline

    13
    ReputationRep:
    (Original post by madi24)
    anyone?
    Yes put in the x and y coordinate in the equation, you should get two simultaneous equitation, then rearrange one and substitute it in the other to find the unknown values.
    • Community Assistant
    Offline

    20
    ReputationRep:
    Community Assistant
    you have been given co ordinates, so for the first one (2,3) means that 2 is x and 3 is y. substitute the numbers into the equation and then work out the other letters. same with the other co ordinates
    i'm not the best at maths, so don't take my word for it but i think that's what you do
    • Thread Starter
    Offline

    6
    ReputationRep:
    (Original post by MadMaths)
    Yes put in the x and y coordinate in the equation, you should get two simultaneous equitation, then rearrange one and substitute it in the other to find the unknown values.
    ok thank you so much
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 9, 2017

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?
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.