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NESA put the paper here: https://educationstandards.nsw.edu.au/wps/portal/nesa/resource-finder/hsc-exam-papers/2021/mathematics-advanced-2021-hsc-exam-pack

The paper is at https://educationstandards.nsw.edu.au/wps/portal/nesa/resource-finder/hsc-exam-papers/2021/mathematics-extension-2-2021-hsc-exam-pack now

Here is the actual picture for Q13a:

Well assuming the reconstruction is approximately correct now, it is clear firstly that the argument of the first root is a quarter that of a+ib. Secondly that the roots are equally spaced, hence on the lines perpendicular to each other. Thirdly that the moduli of the roots are smaller than...

If that is the case then the answer is like this: Was there something a bit more specific about the modulus of a+ib in the question?

So 20 lines like this?

What? That sounds even more complicated. Can you draw it rather than me interpreting your comments and then drawing it wrong?

OK. This might be completely wrong but I made this from your description. Is it about right or completely wrong? EDIT: Apparently is was more like 20 lines. See post #345 at https://community.boredofstudies.org/threads/maths-ext-2-predictions-thoughts.397709/post-7406520 for better picture.

So by most of the paper you mean that part of Q13a was in the answer booklet, so we can't actually answer the question without that bit? Have you got that bit? Without it complete solutions to the paper will be impossible. Once again the race is on to see who will be the first to come out with...

Steve Howard has updated the text and 1000 questions: Text version 8: http://howardmathematics.com/wp-content/uploads/2021/07/HSC-Mathematics-Extension-2-Textbook-v8-2021-07-14.pdf 1000 questions version 5...

The problems in MIF and NSM textbooks stem from the incorrect assumption that -kv2 can be split into horizontal and vertical components -k(vx)2 and -k(vy)2. Steve Howard has provided the following explanation as to why this cannot be done.

There is a new ACARA Mathematics Open Letter referred to in 2 articles in today's SMH and Australian newspapers. This is in regards to ACARA's new draft curriculum which is up for consultation at the moment. Here is the list of signatories, which is growing rapidly...

Here is one for Insight Mathematics: https://www.angelfire.com/ab7/fourunit/Insight-Mathematics-cor.pdf

That link is for the corrections. The solutions link is here: https://www.angelfire.com/ab7/fourunit/20.4-20.5-sol.pdf Anyway I don’t have the biology solutions.

Maths Quest one added for Chapter 9: https://www.angelfire.com/ab7/fourunit/maths-quest-Standard2-cor.pdf

Here is the corrections document for the Standard 2 Year 12 Excel book for Chapter 7: https://www.angelfire.com/ab7/fourunit/Excel-Standard2-cor.pdf OK to put here in Advanced because Normal Distributions are common content.

Here are the NSM Solutions for Sections 20.4 and 20.5 Additional: http://www.angelfire.com/ab7/fourunit/20.4-20.5-sol.pdf

NSM ones have been updated to include example 16d … same link http://www.angelfire.com/ab7/fourunit/NSM-corrections-20.4-20.5.pdf EDIT: Updated again to include Exercise 10(c) and 10(d)

Here is one for Terry Lee's NFM Chapter 11: https://www.angelfire.com/ab7/fourunit/Terry-Lee-NFM-Ch11-cor.pdf

Here is one for MIF Y12 Chapter 10: https://www.angelfire.com/ab7/fourunit/MIF-Advanced-Y12-Ch10-cor.pdf