SOLUTION: Please help and show all work step by step. I have tried this and the answer I came up with was 11 but it was wrong. Find the largest value of x that satisfies: log_5(x^2)-lo

Algebra.Com
Question 998780: Please help and show all work step by step. I have tried this and the answer I came up with was 11 but it was wrong.
Find the largest value of x that satisfies:
log_5(x^2)-log_5(x+4)=7

Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!
Use better notation. Is base 5?
Another one very similar was solved a short time ago today.

Pure text before rendering tags, log(5,(x^2))-log(5,(x+4))=7



Put into exponential form.


COMPARE TO http://www.algebra.com/algebra/homework/Exponential-and-logarithmic-functions/Exponential-and-logarithmic-functions.faq.question.998769.html
http://www.algebra.com/algebra/homework/Exponential-and-logarithmic-functions/Exponential-and-logarithmic-functions.faq.question.998769.html

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!



......change the base





....if log same, than we have









.....use quadratic formula











solutions:

=>

=>

the largest value of that satisfies is:
=>
approximately


RELATED QUESTIONS

I really need help with this question this is a two part question but I feel if you show... (answered by Boreal)
Please help me. Show all work. I tried the problem but came up with this answer for the... (answered by macston)
Please help me I have tried to figure out the amount for daily but all my answers was... (answered by Boreal,MathLover1)
Please help me with this problem. I thought I had the right answer but it was wrong.... (answered by stanbon)
PROBLEM: LET f(x)=3x^2-2x+1. FIND THE FOLLOWING: f(2) *** IN THIS MY TEACHER SAYS THE... (answered by Alan3354)
I have tried to work this out and I keep getting the wrong answer please show me step by... (answered by nitin.thacker)
Please help me solve this equation: {{{1/(x-1)+5=11/(x-1)}}}. i have tried it several... (answered by rapaljer)
Please help me with this math problem- x+y=5 i have tried to solve it by subtracting x... (answered by Mathtut)
Solving System of Linear Equations by Elimination. My math this week shows an example and (answered by reviewermath,richwmiller)