Homework Statement
If a,b are real numbers and b does not equal zero show that |a|=sqrt(a^2) and |a/b|=|a|/|b|.
Homework Equations
I know that |ab|=|a||b| and a^2 = |a|^2
The Attempt at a Solution
Attempt at showing that |a|=sqrt(a^2):
|a|=sqrt(a^2)
|a|^2=(sqrt(a^2))^2...