-18x^2y^-1/2 over 6x^-1/5y....Simplify and express the answer with positive exponents. Evaluate numerical expressions.
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OpenStudy (anonymous):
do you need help in learning how to do these?
OpenStudy (anonymous):
yes i do
OpenStudy (anonymous):
when you write the expression as a fraction, the letters with the negative powers ...if they are above the viculum they go below and the sign changes in their pwer
OpenStudy (anonymous):
Ok I understand that part
OpenStudy (anonymous):
if they are below the vinculum you take them aboce and change the sign in their powers
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OpenStudy (anonymous):
If you end up with ...eg...y^2 x y^1/2...you add the powers
OpenStudy (anonymous):
Ok, add them...Gotcha
OpenStudy (anonymous):
I can lead you through this question if you wish
OpenStudy (anonymous):
Yes if you could please
OpenStudy (anonymous):
Write the whole thing as numerator over denominator
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OpenStudy (anonymous):
\[x^2/x^{-1/5}=x^2x^{1/5}=x^{11/5}\]
OpenStudy (anonymous):
did it
OpenStudy (anonymous):
-18/6= -3/1 = -3
OpenStudy (anonymous):
6 can go into the numbers 18 and 6...cancel
OpenStudy (anonymous):
cancel them out?
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OpenStudy (anonymous):
\[y ^{-1/2}/y = y ^{1/2}y =y ^{3/2}\]
OpenStudy (anonymous):
you will get -3 on top and the 6 at the bottom cancels
OpenStudy (anonymous):
alright ok
OpenStudy (anonymous):
Notice x has a negative power underneath
OpenStudy (anonymous):
oh opss....
\[y^{-1/2}/y= 1/y^{1/2}y= 1/y^{3/2}\]
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OpenStudy (anonymous):
so in the end it's\[-3x^{11/5}/y^{3/2}\]
OpenStudy (anonymous):
i notice it
OpenStudy (anonymous):
carry x^-1/5 on top...it becomes x^1/5 and it is multiplied by x^2
OpenStudy (anonymous):
I am getting the hang of this, I think that I get it now
OpenStudy (anonymous):
The y^-1/2 goes to the bottom
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