Question

Aratati ca numarul a = ($( \sqrt{3}+ \sqrt{2})*(5- \sqrt{6} )+( \sqrt{2} -1) ^{2} -3 \sqrt{3}$ este natural

Answer 1

5√3+5√2-3√2-2√3+2+1-2√2-3√3=(5√3-2√3-3√3)+(5√2-3√2-2√2)+3=3