Im missing something. Can anyone help?

log_2 (x) + log_2 (x-4) = 2

=> log_2 (x^2-4x) = 2

=> x^2-4x = 2^2

=> where do I go from here? Ive tried various methods and cant come up with the right answer. Everything is right up to this point right?

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- Mar 27th 2009, 11:21 AM #1

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