Solve the equation LaTeX:  \displaystyle \log_{4}(x + 251)-\log_{4}(x + 11)=2 .

Using the quotient property of logarithms gives LaTeX:  \displaystyle \log_{4}\frac{x + 251}{x + 11} = 2 . Making both sides of the equation exponents on the base LaTeX:  \displaystyle 4 gives LaTeX:  \displaystyle \frac{x + 251}{x + 11}=16 . Clearing the fractions by multiplying by the LCD gives LaTeX:  \displaystyle x + 251=16 x + 176 . Isolating LaTeX:  \displaystyle x gives LaTeX:  \displaystyle x = 5 .