Answer Happy

2 English proofs Prove or disprove the following claims using an English proof. Be sure to state which proof strategy you are using and your assumptions. Even(x) = 3k(x = 2k) and Odd(x) = 3k(x = 2k + 1). You may also use that an integer is either even or odd without proof a) Prove or disprove that if n is even then n² is even tibor Bid &
b) Prove or disprove that if n² + 3n+ 5 is even then n is even.