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    How do you simplify this
    (2.5)^3 x 4^3
    thanks!
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    (Original post by mayjb)
    How do you simplify this
    (2.5)^3 x 4^3
    thanks!
    What have you tried?
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    (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??
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    (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 a^n\cdot b^n=(a \cdot b)^n
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    (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 a^n\cdot b^n=(a \cdot b)^n
    OK thank you, I didn't realise that rule with different bases but same exponent existed.
 
 
 
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