GCSE Edexcel Maths Paper 1 Higher - 21 May 2019 Unofficial Mark Scheme

Do u even know how to complete the square?
Also negative numbers in square roots do exist - they're called imaginary numbers - but that's A-level further maths or so I'm told.

it said -'estimate' and the nearest square numbers were 64 and 100 so thats 8 x 10 which is 80? thats what i got?

For the volume of the speres (the 50% one) did you guys get 4 over 9?

What about the data handling question - where you had to say whether the student was correct or wrong.
I got correct for the first one and incorrect for the second one, but I don't remember my reasons.

did it specially say to write it as a fraction
cause i wrote it as a percentage -_-

im crying i did so badly

I got that too!! but idk if it's right

how badly tho

isnt it -3??

Yes I just don’t think I’m explaining it good

pretty badly, especially seeing how everyone here has done so well

n^2 - n = n(n-1) so if n is even its an even multiplied by an odd and if its odd its odd *even which are both always even

i dont think so because the negative number function inside a bracket means moving right not left so its a positive co-ordinate...?
like if you have (x-3) the graph would move three to the right not left. and with y when its outside the brackets for negative you move downwards so the co-ordinate negative and for a positive value you move upwards so the co-ordinate stays positive. like if its (x-3)-8 it moves down 8 so its -8 co-ordinate... if any of that makes sense without a graph...

i done some working out but no final answer, sphere c was 225% and a or b was 100 or 150 % so i divded it bu no simplfy

This is how u complete the square:
x² + bx +c = (x + (b/2))² - (b/2)² + c

same, made so many silly mistakes and probably only got about 45/80, wbu?

same, I made so many silly mistakes and probably only got about 45/80, wbu?