Using the completing-the-square method, rewrite f(x) = x^2 + 10x + 7 in vertex form. answers provided f(x) = (x + 5)^2 − 18 f(x) = (x + 10)^2 + 25 f(x) = (x + 5)^2 + 7 f(x) = (x + 5)^2

no i do not : ( what is it?

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)