Answer:
Explicație pas cu pas:
5.
(2√20 - 3√45) : 5√5 = 2√20 : 5√5 - 3√45 : 5√5
= 2√4/5 - 3√9/5 = 4/5 - 9/5 = -5/5 = -1
_____________________
6.
a = 2√24 = 2*2√6 = 4√6
b = 9√6
a*b = 4√6*9√6 = 4*9*6
Mg = √a*b = √4*9*6 = 2*3√6 = 6√6
The ice climbing competition *was held* three times before.
