SOLUTION: ln(x)+ln(x+4)=ln(5)

Question 139105This question is from textbook Algebra 2
: ln(x)+ln(x+4)=ln(5) This question is from textbook Algebra 2

Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
adding logs is multiplying quantities

x(x+4)=5 __ x^2+4x-5=0

factoring __ (x+5)(x-1)=0

x+5=0 __ x=-5 __ logs are not defined for negative quantities

x-1=0 __ x=1
RELATED QUESTIONS
ln(x)-ln(4)=5 (answered by edjones,robertb)

Solve for x [ ln(5) + ln(x - 4) = ln(x)... (answered by TimothyLamb)

ln (5)+ ln(5)= ln (x),... (answered by math_helper)

ln (x + 5) - ln x... (answered by uuuu)

Ln(x-4)-ln(x)=5 (answered by lwsshak3)

ln (x + 5) - ln x... (answered by atif.muhammad)

Solve: ln (x-5) + ln ( x+4)=ln 36 (answered by stanbon)

ln(x-3)+ln(x)=ln(4) (answered by venugopalramana)

ln x - ln(x-4) =ln... (answered by Fombitz)