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# [Maths] Why don't you expand the denominator in this algebraic fraction?

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. Would I lose marks in the exam if I expanded the denominator:

x^2-2x-6/(x+2)(x+1)

because I was doing some My Maths revision and the final answer was the one above whereas I expanded the quadratic to get x^2+x+2x+2.
2. (Original post by BTAnonymous)
Would I lose marks in the exam if I expanded the denominator:

x^2-2x-6/(x+2)(x+1)

because I was doing some My Maths revision and the final answer was the one above whereas I expanded the quadratic to get x^2+x+2x+2.
In the exam, provided they see the former version, probably not. Expanding it is a waste of time and energy. Don't.
3. As a general rule I wouldn't bother expanding any factorised quadratics in your final solution. They prefer factorised as it's a more simple form.
4. (Original post by Zacken)
In the exam, provided they see the former version, probably not. Expanding it is a waste of time and energy. Don't.
(Original post by Cany0n)
As a general rule I wouldn't bother expanding any factorised quadratics in your final solution. They prefer factorised as it's a more simple form.
Tank you all. +rep
5. (Original post by Zacken)
In the exam, provided they see the former version, probably not. Expanding it is a waste of time and energy. Don't.
And you're more likely to make mistakes
6. (Original post by BTAnonymous)
Tank you all. +rep
No problem!

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