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Calculează

√18-√3(√6+√30) +3√10


Răspuns :

rad18=rad(9•2)=3rad2
rad3•rad6=rad18=3rad2
rad3•rad30=rad90=rad(9•10)=3rad10

3rad2 - 3rad2 - 3rad10 + 3rad10 = 0
√18-√3(√6+√30)+3√10
√18-√18+√90+3√10
=3√10+3√10=6√10