## anonymous 5 years ago x cubed over x squared - 4 divided by x cubed - 9x squared over x squared + 7x -18

1. anonymous

could someone help me get started please

2. amistre64

its difficult to parse the question; can you rewrite it into something more discernable please?

3. amistre64

or use () paranthesis around stuff that is supposed to be grouped together? like perhaps: (x cubed over x squared) - (4 divided by x cubed - 9x) squared over (x squared + 7x) -18

4. anonymous

x cubed over x squared - 4 divided by x cubed - 9x squared over x squared + 7x- 18

5. anonymous

x^3/x^2-4/x^3-9x^2/x^2+7x-18

6. anonymous

Need to know where parentheses are.

7. anonymous

no parentheses

8. amistre64

that just leaves order of operations i guess :)

9. amistre64

x - (4/x^3) - 9 +7x -18

10. anonymous

@amistre64 yes

11. amistre64

8x -27 -(4/x^3) 8x^4 -27x^3 -4 ---------------- x^3

12. anonymous

- (4/x^3) +8x -27

13. anonymous

x squared divided by x cubed - 9x square ___________ _____________________ x squared - 4 x squared + 7x-18

14. anonymous

sorry this is the question: x cubed divided by x cubed - 9x squared ___________ ______________________ x squared - 4 x squared +7x - 18

15. amistre64

$\frac{\frac{x^3}{x^2-4}}{\frac{x^3 -9x^2}{x^2 +7x -18}} ???$

16. amistre64

that came out tiny ;)

17. anonymous

thats it

18. amistre64

factor everything so you know what to cancel out; Also, take the bottom "fraction"; turn it over, spank it, and multiply it to the top "fraction"; like this: xxx (x+9)(x-2) --------- * ---------- (x-2)(x+2) xx (x-9)

19. amistre64

Now cancel like terms top tp bottom x(x+9) ---------- (x+2) (x-9)

20. anonymous

thank you, I had it right, I really appreciate it.

21. amistre64

youre welcome :) its alot easier to solve when you can "read" the problem ;)

22. anonymous

are you ready for another one

23. amistre64

I spose.... whatcha got?

24. anonymous

m squared - n squared -------------------- 5m - n m = - 1/5 and n= 1/5

25. amistre64

so you just fill in the variables with the values?

26. amistre64

1/25 - 1/25 = 0 0/anything = 0

27. anonymous