Examples on the Nature of Roots of a Quadratic Equation : ExamSolutions 

Hey I'm from Indonesia and an alumnus of national school. I don't know anything about A level, are you studying A level? Like my friends from international school are doing? Can u pls tell me what are the materials? So I would learn all of them from any platforms online without missing one or more material. Thank u xx

@@lowkeygege2494I am studying A-levels. There is a lot of different A-levels so you may want to look into that in more detail. Personally, I am studying Chemistry, Mathematics and Biology. We study 3 to 5 subjects over 2 years so there would be a lot of material to look at if you want to learn them all and I imagine it would take a while since there's a range of subjects to choose from. There are several sites with revision notes for my subjects at least but there are different examination boards too so, depending on the exam board, the material would be different but only so slightly. These are AQA, WJEC, OCR, CCEA and Edexcel. (AQA is most popular) Here's a quick summary of what they are: A-level is short for Advanced levels. Students study 3-5 A-levels in a lot of detail at school during Year 12 to Year 13 (16-18 years old). These can include Art, Psychology, Geography, IT and so many more. The first year is usually called AS level and the second is called A2 level. You study these after your GCSEs in Year 10-Year 11 (14-16 years old) which is where you study up to 13 subjects in much less detail than A-levels so you can have an idea of what you like. You then learn more about them if you continue with them for A-levels After A-levels, you're likely older than 18 so you can do whatever you want so many people go to university which is where you study whatever you want. There are so many options. Instead of doing A-levels, students can start an apprenticeship or complete BTECs which I'm obviously not as familiar with. I think GCSEs and A-levels are exclusive to the UK but GCSEs come before A-levels and you have to have specific GCSE grades to attend a certain A-level class. For example, I need a GCSE grade B or higher in biology if I want to do it for A-level since there's a lot more content. I'm not sure how the education system works elsewhere so I apologize if I've over explained anything. I hope I helped in someway.

@@tiegan7158 woah thank you so much, now I got it your explanation is really helpful. Here's the thing, in Indonesia we use Indonesian curriculum, only international school have something like GCSE or A Levels. National school have similar exam called national examination, and I did it last year. The problem is, I want to study in UK and I can't use my Indonesian national examination grade or my Indonesian school reward for it. British Council in Indonesia said I could enroll to do A level test here to study in the UK, but they don't have prep course for it, they only have IELTS preparation course. So, I don't know how to study A level materials since its very different with Indonesian materials. So yeah, thats why I asked u. Thank u so much for your answer I really appreciate it✨ but if I want to study Architecture, what subject should I take?

+Soulfreak Rule I set out to show you that with the value of k=4 then substituting this back into the equation gives 4x^2 -4x + 1=0. To find the value of x we now use the quadratic formula and this shows that we get one solution, one root and that is x=1/2. You should be aware of the quadratic formula www.examsolutions.net/maths-revision/core-maths/algebra-and-functions/quadratics/equations/formula-type/examples/example-1.php

I'm not sure but GeoGebra Graphing Calculator works well

Is it imaginary or not