Răspuns:
√(a·b)=√5
ab=5
a=1 , b=5
a=5 , b=1
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√(3ˣ·9ⁿ)=9
√[3ˣ(3²)ⁿ=9²
3ˣ3²ⁿ=(3²)²
x+2n=3⁴
x=n+1
n+1+2n=4
3n=4-1
n=3/3=>n=1
x=1+1=>x=2
am inlocuit y cu n
