True/False: If a real number is not irrational, then it is rational.

Question

anonymous · Answer

true since real numbers are either rational or irrational

anonymous · Answer

actually...if you extend definition to a complex number then it could be false

anonymous · Answer

since a real number can be complex

shadowfiend · Answer

A real number can be complex, but a complex number is not always real. Real numbers are a subset of complex numbers, so considering them here is incorrect.

shadowfiend · Answer

Or, rather, all real numbers *are* complex, but all complex numbers are not real.

anonymous · Answer

true

anonymous · Answer

but in this case is true?
how did I know if the number is real?
thank you guys

shadowfiend · Answer

The problem specifically limits the numbers you're considering to the real numbers.

anonymous · Answer

okey that help thanks

anonymous · Answer

Use the commutative property of multiplication to rewrite the given expression.
(w + 13)(–14)

anonymous · Answer

where I start to rewrite in this problem?

shadowfiend · Answer

Try asking it on the left, more people will see it :)