Question

(2√2-3√3)totul la a doua +2(√3+3√2)totul la a doua - (5√2-1)(5√2+1)=?
REPEDEE!

Answer 1

$(2 \sqrt{2} -3 \sqrt{3} )^2+2( \sqrt{3} +3 \sqrt{2} )^2-(5 \sqrt{2} -1)(5 \sqrt{2} +1)= \\ =8-12 \sqrt{6} +27+2(3+6 \sqrt{6} +18)-50+1= \\ =8-12 \sqrt{6} +27+6+12 \sqrt{6} +36-50+1= \\ =8+27+6+36-50+1=28$