[tex]a=4 \sqrt{5} ( \sqrt{5} +3 \sqrt{20} )- \sqrt{2} (8-3 \sqrt{18} )+8 \sqrt{2} -148
a=4*5+12 \sqrt{5}*2 \sqrt{5}-8 \sqrt{2}+3 \sqrt{2}*3 \sqrt{2} +8 \sqrt{2} -148
a=20+24*5+9*2-148
a=20+120+18-148=10 [/tex]
Le-am facut mai direct ...sper sa intelegi