An integer is a whole number which can either be positive or negative. Hence the numbers are -1,-2,3 to negative infinity or zero or 1,2,3 to positive infinity. In order to solve the problem, we take the square root of 39.But because the answer is not a whole number alone, we take the nearest number in which its square root is an integer. The answer is 36. Hence the answer here is 6.
(3^2)^x-2 = (1/3^3)^x+4
3^2 ^(x-2) = (3^-3)^x+4
3^2x-4 = 3^-3(x+4)
3^2x-4 = 3^-3x-12
2x-4 = -3x-12
x= - 8/5
x= -1 3/4 , x= -1.6
(40+16)=56 or
(4x10)+(4x4)=56 or
4x(10+4)=56