General Certificate of Secondary Education (GCSE)

[keen bane]

so I get it until it says “CE must he a multiple of” - why is that? idk pls help

[vale fox]

because CDE is on a straight line

[keen bane]

so where does the x= 4 come from

and the step before that

so the next step

yh

[vale fox]

so to get from C to E u must go back 4a

and then go from O to E

so thats where u get -4a

and because CE must be a multiple of (-a+b)

if the coefficient of a is -4 b must be 4

as when u factorise 4 out of that u get 4 (-a+b)

[keen bane]

oh thats a hard question I sort of got it now

do u know where to get exam Qs that are only like those, like the back of a paper ik I could do that for all but yh

[wooden needle]

corbettmaths and mathsgenie are both great for doing questions in specific topics

if your school is signed up to a service like sparx or mathsgenie you could use those questions too

pmt has some aswell

i also found this website recently for an infinite test generator, haven't really tried it myself but make sure you're using the 'Higher' setting if you do https://mathsbot.com/practicePaper

[keen bane]

ahh tysm this is such an old thread how come ur looking at this

but ty for the link thou I will defo check it out

[wooden needle]

😂 was bored

nw

gl!