You are Here: Home >< Maths

1. Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
2. it's been a while since I did surd's but if I remember right you treat them like you would fractions.
the root has to be the same (like denominators have to be the same).
3. what level we talking - GCSE's I can help
4. (Original post by Kate Giddy)
Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
As ruthieg101 has said, to add or subtract surds you must first simplify them
e.g. root(32)-root(2)
root(32)=root(16 x 2)=root(16) x root(2)=4 x root(2)=4root(2)
root(32)-root(2)=4root(2)-root(2)=3root(2)

to simplify a fraction with a surd in the denominator you have to know how to rationalise it

For more detailed explanations and examples have a look at the surds topics on the mathsgenie.co.uk revision site
5. (Original post by Kate Giddy)
Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
it is absurd to expect a good answer without specifying further what you are after
6. Thankyou this has really helped(:
7. Year 10

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: February 26, 2018
Today on TSR

### University open days

• Southampton Solent University
Sun, 18 Nov '18
Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '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