another gr 11 math ?

[speg]

i know this is easy but im tired

Simplify:

5x ~~~~~~ 8x+2y
__ ~~ - ~~~ _______

3y ~~~~~~ 7x

 

[abracadabra1]

i don't have a clue of what the hell you wrote there...but my advice is find the common denominator and then subtract (i think that's a substraction sign you have there).
then, after that, cancel out, if possible.

 

[Mday]

speg, i really have no idea what you wrote...

--

btw speg, grade 11 math to me is calculus ;-)

 

[Pretender]

Oh, i get it, the ~'s are spaces...so the problem is

(5x/3y) - ((8x+2y) / 7x)

It's an easy problem but I can't find a pencil to write it down and work with it, and typing it out would be hell.

 

[arod324]

Well, grade 11 math for me is Calculus II

 

[speg]

ya sorry, it is a minus, just ignore the ~'s. ( it would just all crowd together without them)

you could also write it like this, i guess:

[ 5x/3y ] - [ (8x+2y)/7x ]

 

[Pretender]

Ah, found a pen.
Basically, make it a common denominator, so you get

(35 - (24x+6y))
---------------
21xy

simplify, and get

11x-6y
------
21xy


you can probably simplify it further, but I'm too lazy

 

[speg]

i got:

35x^2 - 24xy - 6y^2
___________________

21xy

hmmm.....

 

[Pretender]

ack, i multiplied wrong...gimme a minute...fixing

 

[Pretender]

Yeah, your fraction is right. The only way to factor the top is with the quadratic formula, and you get

24y -+ (1416y^2)^(1/2)
---------------------
70

which becomes

12y -+ y * (354)^(1/2)
---------------------
35



BTW, something to the 1/2 power is the same as the square root, since there's no sqr. root symbol here...

 

[xtreme2k]

I think the answer speg got is simplified enough.

But then basically, it is 'expended' not 'simplfied'

 

[jyrixx]

ok, i'm getting (5x/3y) - x

which is probably really wrong.. i'm rusty on the ole algebra...