Răspuns:
a)x^2 = 2^2 • 3^2 = 36 =>x=6
b)21^2 : x = 21^2 =>x=1
c)x = 25^2 - 24^2 = (25-24)(25+24) = 49
d)x=2^3 + 2^5 = 2^3•(1+2^2) = 8•5 = 40
e)x=10^3=1000
f)18^2 : x = 18^2 =>x=1
g)2^x < 81 =>x={0, 1, 2, 3, 4, 5, 6}
h)3^(2x) > 3^(3x) nu are soluții
i)x=0
j)x=0
k)2^(3x) = 2^6 =>x=2
l)5^(6x) = 5^12 =>x=2