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January 31, 2015

January 31, 2015

Posted by **math** on Monday, March 14, 2011 at 10:00pm.

2 ln(x-3)= ln(x+5) + ln4

- amy -
**MathMate**, Monday, March 14, 2011 at 11:43pmUse the laws of logarithm:

ln a + ln b = ln ab

2ln a = ln a²

2 ln(x-3)= ln(x+5) + ln4

=>

ln(x-3)² = ln 4(x+5)

Raise to power of e:

(x-3)² = 4(x+5)

Simplify and factor to get:

(x-11)*(x+1)=0

Can you take it from here?

- amy -
**math**, Tuesday, March 15, 2011 at 12:20amyes thank you much! :)

- amy :) -
**MathMate**, Tuesday, March 15, 2011 at 12:33am:)

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