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LAST ONE, HELP PLEASE: Rationalize the denominator of...
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\[\LARGE \frac{ 4 }{ 5+\sqrt{2} }\]
multıply by 5-sqrt 2
?
\[ 5(5+\sqrt{2}) /(5-\sqrt{2})(5+\sqrt{2})\]
I can't see it @ksaimouli
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