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# Simplify indices Watch

1. How do you simplify this
(2.5)^3 x 4^3
thanks!
2. (Original post by mayjb)
How do you simplify this
(2.5)^3 x 4^3
thanks!
What have you tried?
3. (Original post by RDKGames)
What have you tried?
I know I can make it (5/4)^3 or (4/5)^-3 therefore four would be common in both bases, I just don't know how to finish it after that and get to the answer which is apparently 1000. Because you can't just do 2.5 x 4 then cube it right??
4. (Original post by mayjb)
I know I can make it (5/4)^3 or (4/5)^-3 therefore four would be common in both bases, I just don't know how to finish it after that and get to the answer which is apparently 1000. Because you can't just do 2.5 x 4 then cube it right??
First of all; 2.5 does not equal 5/4.

Secondly; you can cube everything but the shorter way of doing it is what you've mentioned because
5. (Original post by RDKGames)
First of all; 2.5 does not equal 5/4.

Secondly; you can cube everything but the shorter way of doing it is what you've mentioned because
OK thank you, I didn't realise that rule with different bases but same exponent existed.

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