o.-..
Okay now...
11, 16, 18, 20, 21, 22, and 24 are now (er... for the most part) solved.
This leaves
15,23,25,26 that still arent done.
for 11.. do i gotta factor a x-3 and a x+2 out somehow?????
oK i had this all typed out and my computer died >.<
I have my final exam review here..
Here's the probs:
http://aycu10.webshots.com/image/158...9289183_rs.jpg
Lets start out with 11, 15, 16...
#15.. i did..
x^2-12x=-36
devide by -12..
x^2+x=3
=
2x^2=3
devide by 2
x^2= 3/2
and.. Yeah thats not right. Its supposed to be x=6
Thanks everyone ^^;;
edit: errr.. i guess the attach image thing does work o.0 i never saw it till now..
ok, I have worked out 11 for you (will do the rest later, I'm tried zzzzz)
So anyway....
lets factorise the bottom parts
x^2 - x - 6 = (x + 2) (x - 3)
x^2 - 8x + 15 = (x - 5) (x - 3)
So they cancel the top so we are left with:
1/ (x - 3) + 1/ (x - 5)
get a common denominator
(times (x-3) to the right side, times (x-5) to the left side)
So we get:
(x - 5)/ (x^2 - 8x + 15) + (x - 3)/ (x^2 - 8x + 15)
it becomes:
(2x - 8)/ (x^2 - 8x +15)
and as we know...
(x^2 - 8x +15) = (x - 3) (x - 5)
so answer =
(2x - 8)/ (x - 3) (x - 5)
Happy to help :P I'll be back later, but in the mean-time some other helpful member may have helped you out Goodnight... zzzzzzzzzzz
Ok thanks got that one done.
Just 5 left now..
erm.
ON this page..
...with #16.. would you do... y^3 - y^2 to equal just y??
and on 23... because theres an = sign there and not a plus would you still times the left side by x-3 and the right by x+1??
I tried that and it didnt work for me..
Thanks
so I'll do 16 today :P lol
y^3 - y^2 - 6y = 0
so lets take out the y so we get:
y(y^2 - y - 6) = 0
y^2 - y - 6 FACTORISE to!
(y + 2) (y - 3)
so we now have:
y(y + 2) (y - 3) = 0
this correct? lol
btw on question 11
you can factorise it further to:
2(x -4)/(x - 3) (x - 5)
Ah okay..
I dont need the rest now.. (exam in an hour >.<)
But i suppose you could do them for fun if you'd like! lol!
But thanks for replying on those 2 !!!!!!!!
and..
*sniff* because my exam is today, no more math for me... and more than likely, I wont be back (XD sorry, no offense but i dispise math >.<) so i'd like to give a special thanks to everyone who has dealed with my stupidity over the past ~2 month, and helped me through this, I OWE YOU GUYS!!
But definatelly thanks to Jhevon, helping in the middle of the night, and answering MOST of my questions.. so i could understand it.. you are awesome!
So, I'll be seein ya, math help forum!!
(Ill definately recommend you to anyone i find that needs help )
~Cait