Răspuns :
rationalizam
[ √2(√2-1)/2 -√3(√3+1)/3 + (3√2+2√3)/6] * 3√7/ 2√5
[ (2-√2)/2 - (3+√3)/3 + (3√2+2√3)/6 ] * 3√7/2√5 aducem la acelasi numitor in paranteza
(6-3√2-6-2√3+3√2+2√3)/6 * 3√7/2√5
(6-6)/2 * √7/2√5
0/2 * √7/2√5=0
[ √2(√2-1)/2 -√3(√3+1)/3 + (3√2+2√3)/6] * 3√7/ 2√5
[ (2-√2)/2 - (3+√3)/3 + (3√2+2√3)/6 ] * 3√7/2√5 aducem la acelasi numitor in paranteza
(6-3√2-6-2√3+3√2+2√3)/6 * 3√7/2√5
(6-6)/2 * √7/2√5
0/2 * √7/2√5=0