Question

1). Comparati perechile de nr: a). 2√19si5√3
b). -3√5si-2√11
c). 2√45si3√20
2).Ordonati crescator nr:2√5, 3√3 ,2√3, 2√6 si 3√2.

Urgent va rog!!!!!!!!!!

Answer 1

a) (2√19)² = 4 x 19 = 76
  (5√3)² = 25 x 3 = 75 < 76
5√3 < 2√19

b) La fel: 9 x 5 = 45 > 4 x 11 = 44, dar numerele sunt negative deci
-3√5 < -2√11

c) 2√45 = 2√9x5 = 2x3√5 = 6√5
3√20 = 3√4x5 = 3x2√5 = 6√5
2√45 = 3√20

2) 2√3 < 2√5 < 2√6
3√2 < 3√3
(3√3)² = 27 > 24 = (2√6)²
(2√3)² = 12
(3√2)² = 18
 2√5 > 3√2 > 2√3
Ordinea este:
2√3, 3√2, 2√5, 2√6, 3√3