Plug in 3 for x
f(3) = 2(3) + 1
f(3) = 6 + 1
Solution is 7
√18 ÷ √12 = 1.22474487139159
I have no Idea bro but some people just have to have the best you know and others don't I enjoy helping other people with personal and logical questions without the need for a reward. ;)
