i tried to times everything by 4x to take away the surd but i got nowhere. solve the following equation x-8 = 2√x
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Originally Posted by Miasmagasma i tried to times everything by 4x to take away the surd but i got nowhere. solve the following equation x-8 = 2√x square both sides ... now ... which solution works in the original equation?
Originally Posted by Miasmagasma i tried to times everything by 4x to take away the surd but i got nowhere. solve the following equation x-8 = 2√x or . Darn, beaten...
Last edited by mr fantastic; Dec 9th 2009 at 05:52 PM. Reason: m --> r
thanks guys, i made the stupid error of squaring the 8 initially, rather than the whole side.
... please note that only one of the two solutions is valid.
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