help please, i'm not sure how to solve this question. i know i need to use change of base, but i'm still confused.

solve equation, check for extraneous roots

2^x + 12(2)^-x = 7

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- December 1st 2009, 07:11 AMextraordinarymachineexponential equations
help please, i'm not sure how to solve this question. i know i need to use change of base, but i'm still confused.

solve equation, check for extraneous roots

2^x + 12(2)^-x = 7 - December 1st 2009, 07:35 AMGrandad
- December 1st 2009, 08:56 AMmrmohamed