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2014-11-08T20:04:25+02:00
m=12(√10-1)=12√10-12
n=3+√90=3+3√10
mg= \sqrt{(12 \sqrt{10}-12)*(3+3 \sqrt{10})  }= \sqrt{36 \sqrt{10}+360-36-36 \sqrt{10}  }=√360-36=√324=18