Help me with maths

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21

The answer is that one right there

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im not one to critique ability and competence when it comes to mathematics whatsoever but i don’t understand why you need to ask for your help on the first alevel edexcel further maths topic
you’re doing alevel further maths so you obviously did quite well at gcse and fundamentally nothing here is different to the methods you use at gcse (other than the fact that i^2 = -1)

you’re smart enough to start fm, so you’re smart enough to learn and do fm. grind the questions yourself to build your intuition better and then your revision will feel 100x easier :heart:

yours sincerely a former further maths victim

1 Like
23

Wat is this? Never seen it before

24

I believe it’s advanced Algebra 2

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use chad gee pee T

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Yeah I do mostly agree with you here. Asking for help is fine but it’s better to get help with how to do certain methods (and how to identify which methods to use, that one I remember was an important thing). Just getting the answers isn’t really going to help you learn much, especially at this level where you often can’t tell just by looking at it where that answer came from. (obviously you’d look at what the answers are after you have already attempted the question, but that isn’t the thing you would ask other people to tell you since they might be wrong as well)

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no its as-level further maths/first year a-level further maths (edexcel exam board)
british qualification innit

:face_vomiting:

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I understand the math better than what you just said

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had no clue people here do igcse / gcse here aswell. so do i

30

Mostly unrelated but it should be considered a crime to use graphically similar letters as variables in the same equation

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:sweat:
um
the bit about asking for answers was a joke, I know that’s not a good way to learn
yea I just posted this here mostly for the sillies, I didn’t expect people on here to have actually done fm (or flame me about posting it on here)

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You’d be surprised. People have done similar things before and there are often a lot of people who do show up willing to help. (or just discuss it)

1 Like
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Oh I guess im late

34

guys THE RB1 offered to help me with maths
I am starstruck over here

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My terrible try

(a+3i)(1+bi) = 25-39i

(3+ab)i-25+39i+a=0

Then show how to (I didn’t orgonise my scribbles)

(3b^2)+25b+42=0

Idk to go from here (ab=42 I think)

36

1a as an example:

Multiplying two binomials, use foil method–for visualization, I like to use a box method, such as shown on the wikipedia page for foil method under header ‘table as an alternative’ FOIL method - Wikipedia

so (5+i)(3+4i)=15+23i+4i^2

i is the imaginary number representing sqrt(-1), so i^2=-1. plugging into the previous equation…

15+23i-4

combine the 15 and -4

11+23i

important to remember multiplying polynomials correctly and your powers on i.

i^1=i

i^2=-1

i^3=-i

i^4=1

i^5=i

… it loops

37

what

a + abi + 3i + 3bi^2 = 25 - 39i
(a-3b) + (ab+3)i = 25-39i
a - 3b = 25 → a = 25 + 3b
ab+3 = -39 → ab = -42
(25+3b)b = -42
3b^2 + 2b + 42 = 0

run the quadratic formula: a= 3, b = 2, c = 42, and find b
substitute the result of b into the equation a = 25 + 3b to get a

A/B can be found as (-6, 7) and (18, -7/3)

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genuinely what the fuck am i looking at

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Something imaginary and complex

Seems there’s enough help given here so I won’t jump in. Lmk if there’s something left to do

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I’m baffled at how many people can’t solve this or have never seen anything like this before :sob: this is just basic maths but with complex numbers. You literally get hints in the red boxes. this is so free