factorising

[bitter pumice]

how do you know to take out 1/12

how do you easily find the HCF

in fact im not even sure how they did this line

<@&791435371564892232>

[last grove]

they took 1/12 n(n+1) cf

Then expanded the rest then factorised it

That's how you get the other two brackets

[bitter pumice]

ah

i see

how do you know to take out 1/12 tho

[last grove]

If you wanna take 1/12 cf then just divide each term by 1/12 to get the number that'll remain

[bitter pumice]

why 1/12 specifically

[last grove]

Because you want to get the same numbers if you expand the bracket

If you expand you'll multiply each term by 1/12

Hence to take it cf you divide by it

[bitter pumice]

ut?

oh

yes i understand that

but we can divide by anything no?

you can take anything out because whatever u divide by u will just put on the outside

[last grove]

Yea exactly

But you want it in this form so you do 1/12

[bitter pumice]

alr

btw do you do fm @last grove

[last grove]

Yea

[bitter pumice]

where are you up to chapter wise

[last grove]

Didn't get too deep into pure

[bitter pumice]

does ur school do normal maths in first year or split across both

[last grove]

Yea normal in first year

If you stuck on a question just post it and I'll see if i can help

[bitter pumice]

i was just interested

but thanks

[last grove]

Oh alr

Nws

Did u get this question?

[bitter pumice]

yh