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# Help Me please.

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Exercise: Perform the operation indicated. Express the results with fractional exponents and with no denominators.

a-2 + a-1b - b/ a2b-1

Feb 26, 2018
edited by ManuelBautista2019  Feb 26, 2018
edited by ManuelBautista2019  Feb 26, 2018

#1
+18458
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This is very similar to all of your other postings over the last few days...are you catching on yet??????

This one is (assuming there is a parentheses around the numerator) ....

a^-2 / a^2b^-1     +   a^-1b / a^2b^-1    -   b^2 / a^2b^-1

b / a^4               +      b^2 / a^3             -   b^3 /a^2

a^-2 b  (  a^-2    +      b a^-1                  -   b^2)

Feb 26, 2018
#2
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Never mind

Feb 26, 2018
edited by Guest  Feb 26, 2018
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Manuel says that this is actually

a-2 + a-1b - b2/ (a2b-1 )

So we have

a-2 + a-1b   - b2* b * a-2

a-2 + a-1b - b3*a-2       factor out   a-2

a-2  [ 1  + ab - b3 ]

Feb 26, 2018
#4
+18458
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Guess I 'overthunked' that one, huh?   The other way seemed too easy

ElectricPavlov  Feb 26, 2018
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Actually, EP....the lack of brackets/parentheses in many of the problems leave them open to interpretation.....yours might have been just as "correct" as others

CPhill  Feb 26, 2018