x Turn on thread page Beta
 You are Here: Home >< Maths

# How to rearrange this equation watch

1. Can someone please help me rearrange this equation? Also what will I be writing in the 4th column? Will it be square root f? Attachment 477271

Posted from TSR Mobile
2. (Original post by Clarehd1310)
Can someone please help me rearrange this equation? Also what will I be writing in the 4th column? Will it be square root f? Attachment 477271

Posted from TSR Mobile
Do (b) (i) first and list in the fourth column, then move on to (b) (ii) and re-arrange the equation to

where , and as required.
3. Since it's been square rooted just square it and solve for f.

So, we start with (by the way x = 'multiply', its not a variable):
Root(f)=Root(B) x (Z-1) <<<< square everything
f = B x (Z-1)^2 <<<<< this is the same as saying
f = B x (Z-1)x(Z-1) <<<<< now expand the brackets
f = B x (Z^2 - 2Z + 1)
f = BZ^2 - 2Z + 1

Done, since the question wants Z as the x variable, this looks like a normal quadratic to me. Plug in the B value you found in the last equation if you like.
4. (Original post by Omar J to the T)
Since it's been square rooted just square it and solve for f.

So, we start with (by the way x = 'multiply', its not a variable):
Root(f)=Root(B) x (Z-1) <<<< square everything
f = B x (Z-1)^2 <<<<< this is the same as saying
f = B x (Z-1)x(Z-1) <<<<< now expand the brackets
f = B x (Z^2 - 2Z + 1)
f = BZ^2 - 2Z + 1

Done, since the question wants Z as the x variable, this looks like a normal quadratic to me. Plug in the B value you found in the last equation if you like.
This isn't correct.
5. (Original post by Zacken)
This isn't correct.

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: November 12, 2015
Today on TSR

### Negatives of studying at Oxbridge

What are the downsides?

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