Saturday

October 25, 2014

October 25, 2014

Posted by **lindsay** on Thursday, July 10, 2014 at 10:24am.

3 log x = 1 + log (4x+5)/ log 2

- math -
**Steve**, Thursday, July 10, 2014 at 10:51am3 log x = 1 + log (4x+5)/ log 2

That dividing logs stuff is quite unusual for introductory log problems. I will solve

3 log x = 1 + log (4x+5) - log 2

x^3 = 10*(4x+5)/2

2x^3-40x-50 = 0

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

and that's easy

If you really did mean to divide the logs, then I cannot find any real roots.

**Answer this Question**

**Related Questions**

math - Logarithm!!! Select all of the following that are true statements: (a) ...

Math Help Please - Which of the following expressions is equal to log (x sqrt-y...

Mathematics - Prove that log a, log ar, log ar^2 is an a.p. Is the following ...

Advanced Functions/ Precalculus Log - 1. Evaluate 4^(log base4 64) + 10^(log100...

math(Please help) - 1) use the properties of logarithms to simplify the ...

math - write as a single logarithm: -2logbase3(1/x)+(1/3)logbase3(square root of...

Algebra 2 - how do not understand how to do this Log X + Lob (X-3) = 1 I know I ...

TRig WIth LoGs help1!! - i have problem i can't solve and the book is no help.. ...

Math - solve log(7x-3)+2log(5)=2+log(x+3) I've attempted to do this question ...

math - solve for x without using a calculator 5^(x+1) = 25 i know that x would ...