Question

2log x- log7=log112

Answer 1

Do you remember your rules for adding and subtracting logs?

Answer 2

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

Answer 3

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.

Answer 4

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

Answer 5

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

Answer 6

(feel free to be my fan)