Let a, b Z. Prove that if a + b and ab are of the same parity, then a and b are even
Chapter 3, Problem 3.31(choose chapter or problem)
Let a, b Z. Prove that if a + b and ab are of the same parity, then a and b are even.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer