Question

Log 3 (x +3) + log3 (x + 5) = 1.

Answer 1

log 3(x+3)+log3(x+5)=1

log a+logb=log ab

log(3(x+3)×3(x+5))

log(3x+9×3x+15)

log(9x^2+72x+135)=log10base 10

3x+9×3x+15=1

x=3,5