Răspunsuri

2014-11-10T19:59:05+02:00
3√80+(6-√5) ²-40= 3*4√5+6²-2*6*√5+ (√5)²-40= 12√5+36-12√5+5--40= 41-40=1

P.S. 
√80= √16*5= 4√5
1 5 1