Question 125677
Use properties of exponents to simplify :
a) (9^1/2+25^1/2)^2
= (3*5)^2
= 15^2 
= 225
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b) (25^-1/3)^-3/2
= 25^(-1/2)
= 5^(-1)
= 1/5
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c) (a^6)/27)^-2/3 
= (a^2/3)^(-2)
= (3/a^2)^2
= 9/a^4
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Cheers,
Stan H.