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# Can Someone Help with Factorising Fully watch

1. ..
2. The 3 and 6 look ripe for taking a constant factor out. What is it?
What's the highest power of x and y that could be removed? (without creating negative powers in either term)
3. Bossman I have no clue whats going on, this is the answer I got.

Q: Factorise fully 3xy^2 - 6x^3y

A: 3xy (xy - 3x^2)
4. (Original post by Abu Bakr al Bag)
Bossman I have no clue whats going on, this is the answer I got.

Q: Factorise fully 3xy^2 - 6x^3y

A: 3xy (xy - 3x^2)
5. (Original post by NiamhM1801)
Oh christ im a *******
6. (Original post by Abu Bakr al Bag)
Oh christ im a *******
Happens to the best of us
7. (Original post by NiamhM1801)
Cheers bossman, needed another set of eyes to spot something as stupid as that.
8. The way I learned this was to say to myself "what's the largest part that can be taken from all parts of the expression".

Dunno if that helps.... straight away you can see 3 is the largest factor of 3 and 6.

Then xy is the largest that can be taken from xy^2 and x^3y

So 3xy outside the bracket leaving the rest inside... (y-2x^2)

I always multiply it out again to check it to make sure you get back to the original expression.

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Updated: February 9, 2017
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