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Cat face 3(2√2+1)²+2(√2-3)²?



Răspuns :

3(2√2+1)²+2(√2-3)²=3(8+4√2+1)+2(2-6√2+9)=3(9+4√2)+2(11-6√2)=27+12√2+22-12√2=27+22=49