Recent content by MathematicalMatt

Thanks for the help!

Howdy, I just stumbled on this forum and was hoping someone could help with this proof: If a and b are elements of the Rational Number set, then a*b=0, if and only if a=0 or b=0 With that in mind, I need to prove that: Prove that if a=0 or b=0, then a*b=0 Prove that if a*b=0, then a=0...