You are Here: Home >< Maths

# Help with demand function watch

Announcements
1. The demand set:

D={(q,p):3p+q^2+2q=9}

How do I find the demand function when dealing with quadratics?

I need q(p)= .............

Thanks
2. bump.
(+rep)
3. (Original post by Krebs)
The demand set:

D={(q,p):3p+q^2+2q=9}

How do I find the demand function when dealing with quadratics?

I need q(p)= .............

Thanks
Add 1 to both side and arrange 3p to the right
q^2+2q+1=10-3p
(q+1)^2=10-3p
Solve to q

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 17, 2011
Today on TSR

### University open days

1. Norwich University of the Arts
Fri, 28 Sep '18
2. Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 29 Sep '18
3. Birmingham City University
Sat, 29 Sep '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams