Question

For all real numbers a and b, if ab=0, then a=0 or b=0. True or false?

Answer 1

False I think because the variables are right next to each other which means it's multiplying and 0×0 equal 0

Answer 2

True. For example, if 2 is a, and b was 0, then ab would automatically be 0. Both a and b can be 0 though, but at least one of them must be zero.