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About Sherman D.
Expertise
I can answer questions dealing in mathematics of all kinds except for Physics and Calculus, but i can answer questions in Pre-Calculus and Chemistry. I can also answer questions in Recipes of all kinds. I can find games cheats/walkthroughs, but i can`t find a specific game online or offline. I can also do history and recipes for alcoholic beverages.

Experience
Mathematics, Recipes, History, and Games.

Education/Credentials
High School graduated. I graduated with honors, and i was in Beta Club for a year and a half.

Awards and Honors
Principle's list and A and B honor roll in high school only.

You are here: Experts > Science > Mathematics > Advanced Math > algebra

Advanced Math - algebra

Expert: Sherman D. - 7/3/2008

Question
simplify: (9-x^-2)/3+x^-1)

Answer
if by this you mean

(9 - x^-2)/(3 + x^-1) and those are suppose to be negative exponents

(9 - (1/x^2))/(3 + (1/x))

((9x^2 - 1)/(x^2)) / ((3x + 1)/x)

((9x^2 - 1)/(x^2)) * (x/(3x + 1))

(x(9x^2 - 1))/((x^2)(3x + 1))

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

(3x - 1)/x

ANS : (3x - 1)/x or 3 - x^-1

www.quickmath.com will also simplify your problem into what i have.

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