Solve for x:
logx(121/64)= -2
change to exponential form
x^-2= 121/64
x^2 = 64/121
x = ±8/11 , but we can't have a negative base for logs
so
x = 8/11
logx(121/64)= -2
x^-2= 121/64
x^2 = 64/121
x = ±8/11 , but we can't have a negative base for logs
so
x = 8/11