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# C2 help

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. 3 - 75/x^2=0
can somone help me solve this, its something i should be able to do but i cant get my mind around it.
this is what i should get x=5
2. (Original post by djmans)
3 - 75/x^2=0
can somone help me solve this, its something i should be able to do but i cant get my mind around it.
this is what i should get x=5
You could move the second term over to the right hand side to give

and then try to get the x^2 on its own and work from there.
3. (Original post by SeanFM)
You could move the second term over to the right hand side to give

and then try to get the x^2 on its own and work from there.
Ive got a problem if you could help mee too
√ 7
--------
3-√ 7
Simplifying in surds
4. (Original post by harrxful)
Ive got a problem if you could help mee too
√ 7
--------
3-√ 7
Simplifying in surds
When you want to simplify a surd of that form, what do you usually tend to do with the denominator?
5. (Original post by SeanFM)
When you want to simplify a surd of that form, what do you usually tend to do with the denominator?
times all of it by the denominatior
√ 7
--------
3-√7

*
√ 7
----
√ 7
6. (Original post by harrxful)
times all of it by the denominatior
√ 7
--------
3-√7

*
√ 7
----
√ 7
I know what you're trying to say but you actually have to rationalise it. Since the denominator is
7. (Original post by SeanFM)
I know what you're trying to say but you actually have to rationalise it. Since the denominator is
I spent like 5 minutes trying to analyse where I went wrong
thanks man hopefully I can learn from that now

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