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(2x-5)(x-1)(x+2), find y intercept watch

1. I know you're supposed to multiply the last terms in the brackets together to get the y intercept, I was just wondering with the (2x-5) bracket, does it need simplifying to x = -2.5 first or can I just multiply the terms and leave the (2x-5) bracket as it is?
2. (Original post by Magenta96)
I know you're supposed to multiply the last terms in the brackets together to get the y intercept, I was just wondering with the (2x-5) bracket, does it need simplifying to x = -2.5 first or can I just multiply the terms and leave the (2x-5) bracket as it is?
To get the y intercept you need to make x=0 as that is where it crosses the y axis.
And no 2x=0 so it's (0-5)(0-1)(0+2)
3. (Original post by Robbie242)
To get the y intercept you need to make x=0 as that is where it crosses the y axis.
And no 2x=0 so it's (0-5)(0-1)(0+2)

oh right, makes perfect sense now, thank you
4. (Original post by Magenta96)
oh right, makes perfect sense now, thank you
No problem Goodluck with C1 sitting it in a matter of 2weeks and about a day now!
5. Stay relax and don't make things hard.

The main point is that x=0 at y-intercept.Substitute x=0 and you will get

(2*0-5)(0-1)(0+2) = (0-5)(0-1)(0+2)
= -5*-1*2
= 10
6. (Original post by Robbie242)
No problem Goodluck with C1 sitting it in a matter of 2weeks and about a day now!
I know, I really hope I do well now, in the process of doing all the past papers a second time round to *hopefully* see that I've learnt from my past mistakes
7. (Original post by MR INFINITY)
Stay relax and don't make things hard.

The main point is that x=0 at y-intercept.Substitute x=0 and you will get

(2*0-5)(0-1)(0+2) = (0-5)(0-1)(0+2)
= -5*-1*2
= 10
Thanks!
8. (Original post by Magenta96)
I know, I really hope I do well now, in the process of doing all the past papers a second time round to *hopefully* see that I've learnt from my past mistakes
Have you done all the solomon press papers? I'm doing one a day and it seems to be workly very effectively, I've got 3 more real papers so by the time I get to the exam day I'll be done with them all.
9. (Original post by Robbie242)
Have you done all the solomon press papers? I'm doing one a day and it seems to be workly very effectively, I've got 3 more real papers so by the time I get to the exam day I'll be done with them all.
tbh, I take one look at the Solomon papers and they just freak me out! I think I need today to become more confident at C1 as my grade fluctuates a lot from a low B to an A & there's random questions I don't understand yet, so just kind of re-doing papers I got a B on and bringing them up to A's first. I think tomorrow I'll do a Solomon because pretty much everyone is recommending them. Good luck on C1, you seem very well prepared
10. (Original post by Magenta96)
tbh, I take one look at the Solomon papers and they just freak me out! I think I need today to become more confident at C1 as my grade fluctuates a lot from a low B to an A & there's random questions I don't understand yet. I think tomorrow I'll do a Solomon because pretty much everyone is recommending them. Good luck on C1, you seem very well prepared
Thanks you too! This guy http://www.youtube.com/maths247 Is going through all solomon papers! So if you are stuck he will guide you logically to the correct answer!
11. (Original post by Robbie242)
Thanks you too! This guy http://www.youtube.com/maths247 Is going through all solomon papers! So if you are stuck he will guide you logically to the correct answer!
THIS is exactly what I needed! I was always worried about how I'd start a solomon paper, barely be able to do a question, no one would be able to make me understand and I'd lose all confidence in C1 but I usually understand videos from maths247.

Thank you!
12. (Original post by Magenta96)
THIS is exactly what I needed! I was always worried about how I'd start a solomon paper, barely be able to do a question, no one would be able to make me understand and I'd lose all confidence in C1 but I usually understand videos from maths247.

Thank you!
No problem! always happy to help

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