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Math Help - exponent problem

  1. #1
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    exponent problem

    Hello working on this problem right here and I just can't seem to get it.


    2^2x + 2^x - 12 = 0

    I know the answer is ln3/ln2, but I can't figure out how to do it
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  2. #2
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    Quote Originally Posted by Dan1990 View Post
    Hello working on this problem right here and I just can't seem to get it.


    2^2x + 2^x - 12 = 0

    I know the answer is ln3/ln2, but I can't figure out how to do it
    The equation can be written as (2^x)^2 + (2^x) - 12 = 0 \Rightarrow (2^x + 4)(2^x - 3) = 0 .....

    One solution is not a real number, the other is.
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