Question

Log 9(x²+5)=1
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Answer 1

log9(x²+5)=1
using property of log
x²+5=9^1
x²+5=9
x²=4
x=+2  because log is not negative so -2 will not hold 

Answer 2

For natural log which is to the Base e we have Log 9(x^2+5)=1 x^2+5=9^1 x^2=4 x=+-2 Neglecting the negative value we get x=2