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Calculati :
(2rad2+3rad2)^2
(2rad3+3rad2)^2


Răspuns :

folosesti foemul (a+b)^2=a^2+2ab+b^2

(2rad2)^2+2x2rad2x3rad2+(3rad2)^2

=8+24+18=50

(2rad3)^2+2x2rad3x3rad2+(3rad2)^2

=12+12rad6+18=30+12rad6