You are Here: Home >< Maths

# c1

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
1. how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
2. (Original post by pondsteps)
how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
write it in a different form
you know that a minus means

and that to the power of a half means

and that to the 3/2 means

3. Perhaps if you make a substitutuion such as it may make it easier to see that you are solving a disguised cubic equation.
Looking at the discriminant of the cubic equation formed though, there aren't any real solutions to the equation so if you do want so solve it you'll have to use the cubic formula (which isn't too bad as there is no term in ).
4. (Original post by pondsteps)
how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
This doesn't look like a C1 problem!

Where've you got this problem from?
5. (Original post by thefatone)
write it in a different form
you know that a minus means

and that to the power of a half means

and that to the 3/2 means

lol if that's an actual c1 question that's horrible. yeah I would do what this ^ person did and then multiply everything by sqrt(x)^(3/2). that will cancel one of them out and turn the others into slightly nicer things to deal with
6. er just tried it out thats definitely not c1
7. (Original post by Nayzar)
er just tried it out thats definitely not c1
yeah turned out i was differentiating the wrong equation

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 24, 2016
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:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Study resources

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

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