need help simplifying (5/2)^-2 + (2/1)^-3

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.
ppat
Posts: 2
Joined: Wed Mar 04, 2009 5:38 am
Contact:

need help simplifying (5/2)^-2 + (2/1)^-3

Postby ppat » Wed Mar 04, 2009 5:50 am

(5/2)^-2 + (2/1)^-3

wibblyangelica
Posts: 3
Joined: Wed Mar 04, 2009 2:27 pm
Contact:

Re: need help simplifying (5/2)^-2 + (2/1)^-3

Postby wibblyangelica » Wed Mar 04, 2009 2:33 pm

ppat wrote:(5/2)^-2 + (2/1)^-3

Remember that when a fraction (a/b)^-n is considered you can do a couple of things:
1. You can distribute the exponents to both the numerators and the denominators.
2. Flip the fraction in the parantheses and then do #1.

When you do either step 1 or 2, you will have to find the LCD (Lowest common denominator) to combine the fractions.

:thumb:

User avatar
stapel_eliz
Posts: 1731
Joined: Mon Dec 08, 2008 4:22 pm
Contact:

Postby stapel_eliz » Wed Mar 04, 2009 6:41 pm

ppat wrote:(5/2)^-2 + (2/1)^-3

To review the rules for working with negative exponents, try here. Then follow the steps provided earlier:

. . . . .

. . . . .

. . . . .

...and so forth. :D


Return to “Beginning Algebra”