Math Help!! discussion

Whats 2+2 I’m rlly struggling please help 😔😢

We may never know. It’s one of the great mysteries of the world

I added a math problem in the photos tab because I don't know how to type it on a keyboard. can someone please cheek my work when convenient for them.

can someone pleasee help...tom is math exam lol
prove ( a + b + c )^ 3 – a^ 3 – b^ 3 – c^ 3 = 3 ( a + b ) ( b + c ) ( c + a )

sry we haven’t done proofs yet 😅. i’ll ask my sisters when they get off work if no one has responded to you yet

Charis (God’s Version ✝️) wrote: "sry we haven’t done proofs yet 😅. i’ll ask my sisters when they get off work if no one has responded to you yet"
oh well its okay

imma try and see if i can figure it out myself x)

What lvl math is that??

9th grade

Soha wrote: "can someone pleasee help...tom is math exam lol
prove ( a + b + c )^ 3 – a^ 3 – b^ 3 – c^ 3 = 3 ( a + b ) ( b + c ) ( c + a )"

w8 i can try

I’m in ninth grade too😅. What does ^ mean?

So (a+b)^3 = a^3 + 3ab(a+b) + b^3
-> (a+b+c)^3 = (a+b)^3 + 3(a+b)(c)(a+b+c) +c^3
-> = a^3 + 3ab(a+b) +b^3 + 3(a+b)(c)(a+b+c) + c^3
[taking a+b as one unit and c as one]

LHS = ( a + b + c )^ 3 – a^ 3 – b^ 3 – c^ 3
Solving LHS:
( a + b + c )^3 – a^3 – b^3 – c^3 = [a^3 + 3ab(a+b) +b^3 + 3(a+b)(c)(a+b+c) + c^3] – a^3 – b^3 – c^3
= 3ab(a+b) + 3(a+b)(c)(a+b+c)
= 3(a+b) [ab + c(a+b+c)]
= 3(a+b) [ab + ac + bc +c^2]
= 3(a+b) [a(b+c) + c(b+c)]
= 3(a+b)(b+c)(a+c) = RHS

✝️Reagan wrote: "I’m in ninth grade too😅. What does ^ mean?"

its for power since we cant type(?) it

Apple˚✧ wrote: "So (a+b)^3 = a^3 + 3ab(a+b) + b^3
-> (a+b+c)^3 = (a+b)^3 + 3(a+b)(c)(a+b+c) +c^3
-> = a^3 + 3ab(a+b) +b^3 + 3(a+b)(c)(a+b+c) + c^3
[taking a+b as one unit and c as one]

LHS = ( a + b + c )^ 3 – a..."
tsmmmm

I understand none of that. Ig I haven’t learned it yet. I’m scared now🫣🫣

Lol it's okay it sounds more complicated than it is

✝️Reagan wrote: "I understand none of that. Ig I haven’t learned it yet. I’m scared now🫣🫣"

its okayy its identities stuff 😭

✝️Reagan wrote: "I understand none of that. Ig I haven’t learned it yet. I’m scared now🫣🫣"

Same!!!!!

Am I the only one studying Euclid in ninth grade 😭

sry what???

My teacher is making us study Euclid geometry 😭😔

oh i think so

@Lavendermist no ur not alone T_T

Soha wrote: "@Lavendermist no ur not alone T_T"

Gah we feel each others pain T-T

ikrr it SUCKS T_T

Soha wrote: "ikrr it SUCKS T_T"

is it that proving stuff......?

Yess

Soha wrote: "Yess"

oh ive a love-hate relationship with it

Apple˚✧ wrote: "Soha wrote: "Yess"

oh ive a love-hate relationship with it"
lollll

and then we hv to learn all of euclid's axioms and postulates IN ORDER

Soha wrote: "and then we hv to learn all of euclid's axioms and postulates IN ORDER"

NO STOP BCS WE HAD TO DO THAT IN THE FIRST WEEKS AND WORD EXACTLY-

I DON’T EVEN KNOW WHAT BRO IS YAPPING ABOUT IN HIS PARAGRAPHS EXPLAINING SUM ANGLE RELATIONSHIPS 😭😭😭✋✋✋

ikrr I'm sorry but I can relate T_T

(x+2)^2=49 anyone 😍 (I have NO idea how to do parenthesis in this LOL)

I think we can do it like this-
(x+2)^2=49
x+2=7 (taking square root on both sides)
x=7-2
x=5

as far as ik this should be it loll but I'm not sure maybe u can check if the answer matches

AHH THANK YOU!!

npp!

Are the 4 & 5 like time stamps??? If it was worded as "A girl buys 4 lemons for $3" it would make sense, but that just doesn't 😭

I agree with pierce it’s worded really weirdly!! I’m going to solve it under the assumption that that’s all it is and it’s not about losing money by the hour or something 😭😭

OPTION ONE
the girl buys lemons at 4:00 and sells them at 5:00
- gains $1
this probably isn’t the answer

OPTION TWO
the girl buys 4 lemons for $3 and sells 5 lemons for $4

to solve this you need to find the unit price for lemons, or what one lemon costs. take number of lemons (4) and divide by price ($3) to get what one lemon costs (1.333 repeating; just say 1.3 tbh)
now that we know the unit price of lemons is $1.30, we can figure out what 5 lemons costs. Simply multiply 1.3 by 5 to get 6.5, which we turn into $6.50. Since 5 lemons are worth $6.50, and the girl is selling them for $4, she loses $2.50.
- loses $2.50

this doesn’t actually account for the fact that she supposedly only bought 4 lemons, but that’s more of a thing with the question not making sense. if you worded it more condensed for Goodreads, I think this is the answer!

Apple wrote: "Hear me out, as a valedictorian i am not able to solve this and im on the verge of pulling my hair out, so HELP

A girl buys lemons at 4 for $3 and sells them at 5 for $4. How much loss or gain doe..."

answered! i'm assuming you're in some sort of algebra, if you're in algebra 2 or up I might not be solving it right. congratulations on valedictorian btw!!

Apple wrote: "your neighbor totoro wrote: "I agree with pierce it’s worded really weirdly!! I’m going to solve it under the assumption that that’s all it is and it’s not about losing money by the hour or somethi..."

oh idk then! i'll try to work backwards from the answer and find the method. quick question, is the problem originally written in a different currency than united states dollars? because that's what i'm solving with but when I look up the problem it autocompletes to a different currency? idk lol

i've found a version of this question where they want a percentage of loss and gain and it equals to around 6%. is there any additional information around that question? or is this a different question than the one it's autocorrecting to (Rs)?

genuinely one of the most diabolical math questions I have ever seen 😔😔 congrats on valedictorian!!