I am currently doing some algebra practice for English pre A Level Maths. I am doing examples of a worksheet and I am finding a few problems that have cropped up so far that I would greatly appreciate if someone could explain how to get the right solution as my algebra is pretty patchy in places and needs to be mastered!

Here are they are:

**Simplify the following expressions into their simplest form** **1,**
I simplfied to:

The answer in the back of the book:

?

**2,**
I simplified to:

Answer in the back of the book:

?

**3,**
I simplified to:

The answer im the back of the book:

?

Thanks in advance.

David