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# Edexcel GCSE Mathematics A Higher Paper 2016 Unofficial Markscheme

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2. (Original post by Bernie2016)
I square rooted both sides of X^2 = 4(X-3)^2 to get X = 2X - 6 which i then solved to get X = 6, I dont quite get why this isn't allowed but will i at least get part marks as I got 6 which was one of the answers?
Because let's say X was 2, then 4(2-3)^2 would be 4(4-9) which would be 16-36 which would equal -20. But if you simplified it to 2*2-6 then the answer would be 4-6 which would be -2. Hence 4(X-3)^2 is not equal to 2X-6. That is what I think anyway. I may be wrong.
3. Can somebody make a foundation one please
4. (Original post by HateOCR)
Thats an estimate but i would say u need about 80 just incase
oh my god! brilliant!! thank you so much btw for the grade boundaries!
5. For question 17. did u need to put x= 4.4 and x=-0.4 or would be OK to put just 4.4 , -0.4 ?? ( not put x= )
6. Since it didnt ask for it in its simplest form, do you guys reckon that 1/4 - root6/12 is fine for the answer to the last question as it is still an exact equivalent to 3-root6/12 ?
7. Has anyone done a mark scheme and the marks its worth...
8. Question 6 should say 18×5
9. (Original post by Andy-22)
It was 7x10^8
I literally just realised how stupidI am
10. (Original post by Lb1009)
I think I got 64/100 does anyone knows what grade it would be
either C or B
11. Yes yes people how was the exam
12. What are the marks for each question?
13. What do you think you'll need for an A?
14. Im sure it was 70 m2 for the whole area of that shape
15. (Original post by Louise2016)
For question 17. did u need to put x= 4.4 and x=-0.4 or would be OK to put just 4.4 , -0.4 ?? ( not put x= )
Yes, that's okay.
16. for the x^2 = 4 (x-3)^2 question, i got 6 and (6/3)- which is 2 but i didnt write 2...

I did the working out and everything but left 2 as a fraction (6/3)- could i still get full marks for the question?
17. for the last part of the vectors question about point S, i put that it was also 3:1 on the line OT (or something like that) and said the lines were the same. Could i get at least 1 mark for that?
18. (Original post by Sum Ting)
Harshly marked, think i got 86
Probably an A*
19. Does anyone have rough estimates of the grade boundaries? :P
20. (Original post by NeedsHelpalot)
Im sure it was 70 m2 for the whole area of that shape
No, it was 60m^2 - 10m^2
Therefore it was 50m^2

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Updated: October 14, 2016
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