Wednesday

September 17, 2014

September 17, 2014

Posted by **Anon** on Friday, July 12, 2013 at 12:50pm.

[(x^-3)-x]/[(x^-2)-1]

- AP Calc. -
**Steve**, Friday, July 12, 2013 at 12:51pmx^3-x = x(x^2-1)

- AP Calc. -
**Anon**, Friday, July 12, 2013 at 12:52pmI don't get it...

- AP Calc. -
**Steve**, Friday, July 12, 2013 at 12:53pmsure you do. factor out x^2-1 top and bottom

- AP Calc. -
**Anon**, Friday, July 12, 2013 at 12:54pmbut don't you have to get rid of the negative exponents somehow..?

- AP Calc. -
**Steve**, Friday, July 12, 2013 at 12:56pmsorry. I missed the negative exponents.

(x^-3 - x)/(x^(-2)-1)

(1 - x^4)/x^3 / (1-x^2)/x^2

(1-x^4)/x^3 * x^2/(1-x^2)

(1-x^2)(1+x^2) / x(1-x^2)

(1+x^2)/x

- AP Calc. -
**Anon**, Friday, July 12, 2013 at 12:58pmHow did you go from the original question to the 1st step?

- AP Calc. -
**Steve**, Friday, July 12, 2013 at 12:59pm1/x^3 - x

over a common denominator of x^3, x = x^4/x^3

- AP Calc. -
**Anon**, Friday, July 12, 2013 at 1:01pmohmygosh.. i'm an idiot.. thank you! you're the bestt!(:

**Answer this Question**

**Related Questions**

Calc. Help - Simplify. #1. 5(2-i) - 3(4+3i) ..my work: 10-5i-12-9i -2-14i Do you...

Calc AB - How do you simplify: (x^(3/2))(x+x^(5/2)-x^2)

Calc AB - (1/(x+h))-(1/x) ..simplify

pre calc - simplify: 2^x X 2^y +2^x X 2^y + 2^x X 2^y + 2^x X 2^y

Pre Calc - Simplify: n!-(n-1)! --------- (n-1)!

pre-calc - what does this simplify to: f(x)=x/(x+4)^(1/5)-2

pre-calc - How do u solve (f-g)(x) when f(x)=4x/7 +7 and g(x)=-6/x Ok so its (f-...

calc - How do you simplify tan(sin^-1 (x)) ?

Pre Calc - Simplify (n+1)!/(n-1)! Help please?

Pre-calc - simplify cot(x+π)