For the completing the square question I goofed up. The question was -2x^2+12x+4 but I took the values to the other side and got 2x^2-12x-4 and I completed the square. How many marks will I get. Also will I get error carried forward for the next question asking for the maximum point?
For the question about the circle being wholly inside the other, did anyone else get 0<r<√45 - 5? Most people got 0<r<2, but I thought that this may not be right
yeah I got r<√45 - 5 but everyone I've spoken to got r<2 . I can't figure out how they got that though
For the completing the square question I goofed up. The question was -2x^2+12x+4 but I took the values to the other side and got 2x^2-12x-4 and I completed the square. How many marks will I get. Also will I get error carried forward for the next question asking for the maximum point?
yeah I got r<√45 - 5 but everyone I've spoken to got r<2 . I can't figure out how they got that though
i got r<2, im not saying it's correct, because im hearing people say its r<root45, but the way i got 2 was wen i was calculating the x value of A which was 10. since it was a quadratic, i also got that there was another x interception at -2. therefore i thought that r had to be smaller than 2 because if it was bigger then it would have gone outside the circle, if you see what i mean.
So thanks for the people that put up the mark scheme, I reckon I got 50 at worse and about 56 at best. Really hoping that's an A, it was much harder than most of the other papers I can remember doing.