Răspunsuri

2014-01-12T16:45:14+02:00
2√3 + 5√3 = √3 ·(2+5) = 7√3
7√11 – 8√11 = √11 (7-8) = -1√11 = -√11
6+3√21 +2√21 -10 = 6-10+3√21 +2√21 = -4 +5√11
√2 +√2 = √2 (1+1) = 2√2
5,1√13 +√13 +8,5√5 -7,5√5 = 6,1√13 +√5