## anonymous 5 years ago 2log x- log7=log112

1. anonymous

2. anonymous

2logx-log7 is the same as log((x^2)/7)

3. anonymous

i'l give you a hint to get you started. First you add log(7) to both sides. This should yield 2log(x) = log(112) + log (7). The formula for adding logs is log(x) + log(y) = log(x*y) as long as if you have same base. This is not all there is the 2 the questions, but it's a good way to start.

4. anonymous

this is the solution$10^{\log(784)}=x^{2}$

5. anonymous

which leaves you with$\sqrt{784}=x=28$

6. anonymous

(feel free to be my fan)