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Surds: Dividing by Negative Numbers

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Reply 40
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TheWantedGuy
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Original post by Mr M
Wasn't ever unhappy. TenOfThem and I are maths teachers - GCSEs had not been invented when we were at school if that explains the dinosaur reference.


Oh okay, sorry for sounding rude ^^ What level do you teach at?
Original post by TheWantedGuy
Oh okay, sorry for sounding rude ^^ What level do you teach at?


KS3, GCSE and A Level.
Reply 42
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TheWantedGuy
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Hey,

I've got another question about Surds... if you don't mind helping lol xD

7(sq root of 5) + 15 / 5, can you cancel down the 15 with the 5, to make it: 7(sq root of 5) + 3, or can you only do it when the whole thing is divisible by the denominator, in this case, including 7?

Cheers.
Original post by TheWantedGuy
Hey,

I've got another question about Surds... if you don't mind helping lol xD

7(sq root of 5) + 15 / 5, can you cancel down the 15 with the 5, to make it: 7(sq root of 5) + 3, or can you only do it when the whole thing is divisible by the denominator, in this case, including 7?

Cheers.


no ... as you say the 7 is not divisible by 5
Reply 44
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TheWantedGuy
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Original post by TenOfThem
no ... as you say the 7 is not divisible by 5


Thought so.

Thanks.

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