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    deshowers's Avatar
    deshowers Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jul 8, 2012, 01:34 PM
    Same base with fractional exponents
    This is a sample question on a college test site for math.

    2^(5/2)-2^(3/2)

    A. 2^(1/2)
    B.2
    C. 2^(3/2)
    D. 2^(5/3)
    E.2^2

    How do I find know that C is the answer?
    ArcSine's Avatar
    ArcSine Posts: 969, Reputation: 106
    Senior Member
    		  
    #2

    Jul 9, 2012, 04:45 AM
    Re-express as and then factor out from both terms.
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