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siliviax
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#1
Report Thread starter 16 years ago
#1
i don't know why but i dont understand factorising;

for example: simplify the following:

3x^2 - 6x

how do you go about working that out?
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Nylex
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#2
Report 16 years ago
#2
3x^2 - 6x

'Pull out' an x: x(3x - 6)

There's an x in each term, so you can take it out as a common factor. If you multiply out the bracket, you get what you had before.

I'm not really good at explaining stuff, but I hope that helps a bit.
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Me2
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#3
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#3
could also be:

3x(x-2)
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siliviax
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#4
Report Thread starter 16 years ago
#4
that helps but i also got some additional help from my friend who says you should simplify that out like this. So:

3x^2 - 6x

would be;

3x(x - 2)

But yours would still be correct? - i dont get that part.
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siliviax
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#5
Report Thread starter 16 years ago
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Me2 beat me to it hehe

so both: 3x(x - 2) and x(3x - 6) would be correct?
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Nylex
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#6
Report 16 years ago
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(Original post by siliviax)
Me2 beat me to it hehe

so both: 3x(x - 2) and x(3x - 6) would be correct?
Yes, both are right. I evidently missed the factor of 3 .
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yusufu
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#7
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(Original post by siliviax)
Me2 beat me to it hehe

so both: 3x(x - 2) and x(3x - 6) would be correct?
in a way, but factorising is usually seen (by myself anyway) as taking all of the factors outside the brackets
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siliviax
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#8
Report Thread starter 16 years ago
#8
Thanks for your help
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bono_2
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#9
Report 16 years ago
#9
(Original post by siliviax)
Me2 beat me to it hehe

so both: 3x(x - 2) and x(3x - 6) would be correct?
3x(x-2) would be the best answer.
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