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calculati pe lung:[tex]a)( \sqrt{3} ( \sqrt{27} + 4\sqrt{3} );
b)( \sqrt{3} + 2)^{2} - \sqrt{12} ;
c)( \sqrt{45} - \sqrt{5} )^{2}-20[/tex]


Răspuns :

a) rad3(3rad3+4rad3) = 3x3 +4x3 = 9 + 12 = 21
b) 3+4rad3+2-rad(4x3)= 5+4rad3-2rad3 = 5 + 2rad3
c) 45-2rad45 x rad5 +5 = 50 - 2 x rad9 x rad5 x rad5 = 50 - 2 x 3 x 5 =50-30=20

Succes in continuare! Astept coronita!