Monday

September 1, 2014

September 1, 2014

Posted by **Sarah** on Tuesday, December 11, 2012 at 5:53pm.

log2 x + log2(x+2) =3

- Precalculus -
**Steve**, Tuesday, December 11, 2012 at 6:59pmlog2 (x(x+2)) = 3

x(x+2) = 2^3 = 8

x^2 + 2x - 8 = 0

(x+4)(x-2) = 0

x=2

throw out x=-4, since logx is not defined for x<0

**Related Questions**

Logarithms - I'm working on logarithmic equations and I'm stuck on how my book ...

Math - Logarithmic - Solve: 2^(5x-6) = 7 My work: log^(5x-6) = log7 5x - 6(log2...

math - solve the equation log2(x+4)-log4x=2 the 2 and 4 are lower than the g ...

Math - The problem I have to solve is log with base 2 ^6 multiply by log base 6...

math30 - 1.Use the laws of logarithms to express log2 (6) – log2 (3) + 2log2 (...

maths pls help - 1. Solve the following simultaneous equations: log2 xy = 7 log2...

Algebra II - Please check answers: Use the equation of the exponential function ...

precalculus - find the exact value of the following logarithm. Use the ...

add maths - Given that log2 3=h and log2 5=k, express log2 0.45 in terms of h ...

calculus - Solve the equations i) log2(x + 2) + log2 x = 3. ii) 25^x + 5^x+1 + 6...