SOLUTION: What is the geometric mean of -1.5 and -80? Screenshot of answer choices are below please copy and paste the link please. Link ; http://prntscr.com/aoz74e thanks

Algebra ->  Trigonometry-basics -> SOLUTION: What is the geometric mean of -1.5 and -80? Screenshot of answer choices are below please copy and paste the link please. Link ; http://prntscr.com/aoz74e thanks      Log On


   

Question 1028449: What is the geometric mean of -1.5 and -80?
Screenshot of answer choices are below please copy and paste the link please.
Link ; http://prntscr.com/aoz74e thanks
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
We can find the answer by setting it up like this:
%28-1.5%29+%2F+x+=+x+%2F+-80
Now cross-multiply and get
x%5E2+=+120
x+=+sqrt%28120%29
so that
x = plus or minus 2*sqrt(30)
(The link did not work for me.)