Réponses

2014-10-09T08:42:32+02:00
A=4²+2*4*5*√2+5²*2+2*3*2+2*7*√2-3*3*√2-21=16+40√2+50+12+14√2-9√2-21
A=57+45√2

B=3+2√3√2+2-6+2√6-1+3+2√3√8+8=9+2√6+2√6+2√24=9+4√6+2*2√6
B=9+8√6

C=√3(√(√7-2)*√(√7+2))=√3(√((√7-2)(√7+2)))=√3√(7-4)=√3√3=3