Need Work Please!

Oh, and root(32) = root(16x2) = root(16)root(2) = 4root(2) so you can cancel from there.

Well, as I said, it will probably get a lot easier once you have covered more topics in C1 and C2, and get more experience with these kind of questions. I remember sitting there with my first FP1 homework going ??? and I was actually in the lesson, heh.

Yeah, the quadratic formula should do for all of them. You might be able to get the first without it though, is that supposed to be a 0, or a 10 ?

so that one you should be able to do w/o the quadratic formula too =)

4z^2 + 9 = 0

4z^2 = -9

from this point on is where i get confused lol

4z = root (-9)

what now lol

You can't do that, you have to square root the whole of both sides, I'll show you for this example:

$4z^2 + 9 = 0 \implies 4z^2 = -9 \implies z^2 = - \frac{9}{4} \implies z = \pm \sqrt{-\frac{9}{4}}$

I'll let you put it into the form of an imaginary number

-.-' this stuff is really confusing lol

No offence, but this stuff is not really confusing. You seem to be doing a further maths module without ever having done C2 binomial expansion, and without realising that (a^2 + 1)^2 and a^4 + 1 are not the same thing, which (last I checked) came up around year 10. Same with surd manipulation, which is also around year 10. All of the stuff you're calling "really confusing" should be very basic, very obvious techniques to you by now - you're not actually struggling with the idea of a complex number at all.

Go back and revise GCSE and AS maths. Did you just go back to school straight after the summer having forgotten it all and expect to be taught it all again from scratch?

i can assure you this stuff wasn't in gcse maths

and also, I just started college

Multiplying out brackets bloody well is in GCSE maths, and so is the manipulation of surds. And if you've just started college, and therefore haven't done AS maths, you shouldn't be doing questions that require AS maths, i.e. questions that imply you should use binomial expansion, since FP1 is more advanced than C1 and C2. To find out which questions you should be doing, you need to be in college. So, like everyone's been saying for quite some time, go and ask someone in college or your teacher what your set work is.

I know which questions I should be doing because that's the worksheet that was given and she said do questions 1 - 5, and that was question 3

I have never done binomial expansion but maybe others in my class have, I dunno, all I know is that I find it very confusing.