Thursday
March 26, 2015

Homework Help: Pre-calc Solve logarithmic

Posted by Marcos on Wednesday, October 30, 2013 at 9:46pm.

ln sqrt(x-8)= 5

I would like help to solve this what i did was to take away the square root i squared both sides coming up with

(ln sqrt(x-8))^2= (5)^2

ln(x-8)=25

am i alowed to do this with ln in the equation?

then i subtract 8 from both sides

ln x = 17

e^(ln x)= e^17
e cancels out ln leaving with
x=e^17

this is not right the real answer is
x = 8 + e^10 on math-way but how?

thanks

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

algebra solving log equations - n sqrt(x-8)= 5 I would like help to solve this ...
Algebra - Solve for s: h=(square root of 3)times s/2 and solve for h V= (pi)r ...
math - Solve for the indicated variable A=1/2 bh Solve for b 2A = bh, so b = 2A/...
math - determine the area of triangle abc when side ab= square root of x, side ...
maths - how do i solve this equation? 21(X-(1/7))^2= 3/7 thx Divide both sides ...
Surds - Solve in the exact form. (sqrt of 4x+1)+(sqrt of x+1)=2 Someone showed ...
radical equation - 2^x+20=15+3^x A)1 B)16 C)-5 D)25 I chose c but i got it wrong...
Math - How do you find a square root of a number that's not a perfect square? I'...
algebra - simplify: square root of 5 + square root of 20 - square root of 27 + ...
Math check - Solve: sqrt(7x-5)+sqrt(15x+4)=sqrt(30x+31) would I square both ...

Members