Question

How can i factor 27+12

Answer 1

Firstly look for the highest number which goes into both of them:

1 goes into both of them
3 goes into both of them and is the highest so we use this one.

Next write a 3 outside a set of brackets:

`3(\ )`

Then, the point of these brackets is that you times everything inside them by 3 so in order to get the numbers inside, you divide both by 3.


`27 / 3 = 9`

`12 / 3 = 4`

So now put these back into the brackets and you're done:


`3(9+4)`

Try to factorise
`18+12` now to make sure you understand.

Answer 2

= 27 + 12
3 is common in both of them so
= 3 (9 + 4)
The answer is 3(9+4).