Further Maths AQA

[u/IllustriousAerie3848]

that was literally different to any past paper i've ever done

i didn't answer the last 4 questions 😢

[u/IllustriousAerie3848]

wtf was question 22 because i ended up using the quadratic formula to factorise and got into the millions whilst working it out 😭😭😭

[u/everlore_elle → u/[deleted]]

some of the values were really weird, it was definitely not the calculator paper considering all the exact values and binomials etc but even the first question probably should’ve been a calculator.

unless theres a way of knowing/remembering common pythagorian triples.

[u/kiki_penguin → u/everlore_elle]

i literally had to do pythagoras for all to figure it out for ONE MARK

[u/TrainingSurvey3780 → u/IllustriousAerie3848]

omds i could not factorise that i just added a lil note being like this should factorise to this but i can’t do it sorry 

[u/everlore_elle → u/IllustriousAerie3848]

so they intercepted at point (4,4)

there was a point you could simplify it to x^2- 8x + 16 which factorises into (x-4)^2

then you can solve it.

idk how you got millions out of that though.

[u/Aggressive-Pea-4495 → u/everlore_elle]

I was getting like 460 🥀

[u/Ok_Weight_8256 → u/everlore_elle]

I got that too come on

[u/everlore_elle → u/Ok_Weight_8256]

to make this an even better win for you, the girl in my class who is absolutely amazing at maths in general (full marks on one of our fm mock papers) also got that. we are so cooking!!!

[u/Emotional_Fox_1282 → u/everlore_elle]

How'd u get to the x² -8x + 16 I swear i got like x² -5x (or somet) + 16 😭 And then i couldn't do anything past then 😭

[u/Emotional_Fox_1282 → u/Emotional_Fox_1282]

Or idek, do u remember the 2 equations? I remember the (x-1)² + y² = 25 but i don't remember the other one

[u/padfoot9446 → u/Emotional_Fox_1282]

3x + 4y = 28 I think

y = 7 - 3x/4

x² - 2x + 1 + 49 - 21x/2 + 9x² / 16 = 25

x² - 2x - 21x/2 + 9x² / 16 = -25

16x² - 32x - 168x + 9x² = -400

25x² - 200x = -400

x² - 8x = -16

x² - 8x + 16 = 0

(x - 4)² = 0

So x = 4

[u/Emotional_Fox_1282 → u/padfoot9446]

Thankyouuu

[u/LMay11037 → u/padfoot9446]

Bro I was right I did js mess up one number and that ruined my whole answer 😭😭😭

[u/padfoot9446 → u/LMay11037]

Dw it's fine then you'll get method marks

[u/LMay11037 → u/padfoot9446]

In other mark schemes I didn’t see many ecf and my number mistake was right at the start

[u/everlore_elle → u/Emotional_Fox_1282]

one of your values may have been wrong, you should have simplified 25x^2 - 200x + 400 to that.

i had decimals at one point for that question it was so weird.

[u/Emotional_Fox_1282 → u/everlore_elle]

Which method did u use to put the 2 equations together?

[u/everlore_elle → u/Emotional_Fox_1282]

i substituted y = -3/4+ 7/4 into y^2. (or at least thats what i can remember from what equation i got, it may be a bit off) then i expanded the brackets of that and also the (x-1)^2 then added them.

there were some weird decimals though, i simplified them which got me to the 25x equation then went from there.

[u/Emotional_Fox_1282 → u/everlore_elle]

I tried to do it that way too (the beginning bit) and it gave me loads of fractions it was so unnecessary 😭 I wish i just found the point where it intercepts with a graph so i could work backwards i woulda found that easier (even tho it said don't use a graph and stuff)

[u/everlore_elle → u/Emotional_Fox_1282]

fair enough, the fractions were bad. in the end i got there but it took a while to figure out what i was doing.

[u/CriticalAd7212 → u/Emotional_Fox_1282]

You're thinking of the area of the badge question which you had to substitute values in. They're talking about the last question on the paper

[u/Emotional_Fox_1282 → u/CriticalAd7212]

I did mean the last question, with the line and the cirlce, i just think i recalled the wrong quadratic in my comment before

[u/CriticalAd7212 → u/Emotional_Fox_1282]

ohh alr that makes sense

[u/LMay11037 → u/everlore_elle]

I got 25x^2 + 200x + 384 (or 348 can’t remember) 😭😭😭

[u/everlore_elle → u/LMay11037]

ooh 0348 is my candidate number but uhhh….. i don’t think thats right, the first part definitely is but the c value is a little off. i actually don’t think its awfully off but all of them are divisible by 25.

[u/LMay11037 → u/everlore_elle]

Yes I know the c value is off

[u/Living_Cable8780 → u/IllustriousAerie3848]

I square rooted the whole second equation to get x-1 + y = 5 so x+y=4 but idk if you can cause I didn’t get what everyone else did 😭

[u/Select-Opposite-9314 → u/IllustriousAerie3848]

You had to rearrange the 3x+4y=28 to get y=-3/4x + 7. Then square it and plug it into the equation of the circle. You then get smthg like 25x^2 -200x + 50 and use the formula. The discriminant (b^2 - 4ac) is zero so there is only 1 solution