Stuck On Algebra! (1 Viewer)

[k-la]

anyone else finding algebra and equations hard to understand?? can anyone explain some simple basics??

 

[S13WPN]

post up some q's you're struggling with...

 

[k-la]

i kinda get the basics like adding or subtracting like terms... and all that
its the larger ones that confuse me

heres a couple

1) 3x(2x-4y)-2y(4y-6x) =

2) 3z(y-2z)+4y(2y+z) =


much apreciated

 

[kimberlei]

hmm.. i thought
1) 3x(2x-4y)-2y(4y-6x)
= 6x squared - 12xy-8y squared+12xy
= 6x squared - 8y squared

and..

2) 3z(y-2z)+4y(2y+z)
=3zy - 6z squared + 8y squared + 4zy
=7zy - 6z squared + 8y squared

 

[danieljarvis]

i kinda get the basics like adding or subtracting like terms... and all that
its the larger ones that confuse me

heres a couple

1) 3x(2x-4y)-2y(4y-6x) =

2) 3z(y-2z)+4y(2y+z) =


much apreciated

doing this for myself, as im not so good at algebra!!

s = squared
1) 6xs-12xy - 8ys + 12xy = 6xs - 8ys ( same as other person yay! )

2) 3zy - 6zs + 8ys + 4yz = 7zy - 6zs + 8ys ( easy that one! )

 

[danieljarvis]

simplify expand and to change the value of an equation..

say y = x + 5 change the value to x

x = y - 5

 

[k-la]

Thanx Kimberlei - so you just pretty much multiply whats outside the brackets to whats inside the brackets and thats expanding - makes more sence now

for the general course do we just need to know how to simplify and expand?

 

[k-la]

oh dear! i have alot to catch up on - months and months of putting off algebra has finnaly caught up to me. Thanx guys!

 

[kimberlei]

Yups.. no problems.
Umm.. wateva is in the text book is wat we needa noe i think.. everyfn :-/
U studyin for the hsc test on monday?

 

[k-la]

oh yes! im studying my lil ass off!! maths is my worst subject and of lowest scaling!!! but its mainly algebra a bit of trig and the confusion of probability that drags my marks down!! go back 2 years i wouldnt have even thought about chosing maths as a subject!!!!

 

[the_thomasu]

You know I think I was better at maths before I started the general course. It's lack of mathematical heart made it feel like for me that I haven't even been doing maths for the last year (I changed from advanced to general at the start of yr12).

Absolutely fundamental principles of maths such as algebra we just didn't use for the whole year. I just don't think teachers are realising that algebra should be reinforced more, they think it's something everyone instantly knows as if we all speak it at home like a first language the way they probably do with their loved ones (gross!).

When we come across some question in class and it gets to the point where the teacher would run through it on the board, hands would be going up asking "wtf did that become a negative" "huh where did that come from". And 99% of the time it would be because you'd be balancing the equation or something else fundamentally simple.

[edit] heh, I'm pretty good else where in maths except algebra. It's actually quite embarassing when simplifying an algebraic fraction or something, and can't find help in my yr11 or yr12 books because its just too fundamental to be in the 'fundamental principles' section. So then have to consult elementary level books.

I take responsibility for this, in yr7-yr9 I dont think I did any maths work what so ever. Maths isn't something you just wing off like other subjects, requires actual practise. Same with a language, did absolutely terrible at French in yr8 as of 0 effort and am doing brilliantly at German now as I practice all the time.

 

[chinkyeye]

fools, don't knoe how 2 exapnd algebraic functions....noobies

 

[Casmira]

fools, don't knoe how 2 exapnd algebraic functions....noobies

niec speeling

 

[chinkyeye]

u can't talk

 

[chinkyeye]

hey i need help with this question... can u's intergrate:

6e^x^(x/2) dx

 

[kimberlei]

ummm.. not sure if im right but would it be:
6e^x^(x/2)dx
= 6e squared x cubed /12e squared x squared +dx
=1/2 dx squared
=dx squared/2

??

 

[Trev]

ummm.. not sure if im right but would it be:
6e^x^(x/2)dx
= 6e squared x cubed /12e squared x squared +dx
=1/2 dx squared
=dx squared/2

??

No... 6e^{x^x/2}?
It is beyond the HSC course to integrate that, so stop being a dickhead and posting 'questions' you know shit all about (chinkyeye).

 

[chinkyeye]

ahahh i was bored, i don't even do general lol

 

[Casmira]

u can't talk

 

[anita_wax]

u can't talk

yau obvauslay dun gat sarczm!11!!!11 </moron>