[tex]5 \sqrt{18} + \sqrt{12} - 3 \sqrt{20} + \sqrt{72} + [/tex]
[tex] \sqrt{45} = [/tex]

VA ROG FRUMOS REPEDE DAU COROANA


Tex5 Sqrt18 Sqrt12 3 Sqrt20 Sqrt72 Textex Sqrt45 TexVA ROG FRUMOS REPEDE DAU COROANA class=

Răspuns :

rad18=rad(2×3^2)=3rad2 =>5rad18=15rad2
rad12=rad(2^2×3)=2rad3
rad20=rad(2^2×5)=2rad5 =>3rad20=6rad5
rad72=rad(2^3×3^2)=6rad2
rad45=rad(3^2×5)=3rad5

15rad2+2rad3-6rad5+6rad2+3rad5=
21rad2+2rad3-3rad5