Răspuns:
Explicație pas cu pas:
3/√8 = 3/√(2²·2) = 3/2√2 = 3√2/4
6/√12 = 6/√(2²·3) = 6/2√3 = 6√3/6 = √3
-7√15/√20 = -7√15/√(2²·5) = -7√15/2√5 = -7√3/2
2/√24 = 2/ √(2³·3) = 2/2√6 = 1/√6 = √6/6
16/√32 = 16/√(2⁵) = 16/√(2⁴·2) = 16/2²·√2 = 16/4√2 =
= 4/√2 = 4√2/2 = 2√2
4/√28 = 4/√(2²·7) = 4/2√7 = 2/√7 = 2√7/7
2a/√(a²·b) = 2a/a√b = 2/√b = 2√b/b ; a,b > 0
#copaceibrainly
