- #1
ryou00730
- 29
- 0
Homework Statement
Trying to prove that for all integers a, 9 does not divide a^2 +3
Homework Equations
there exists no k such that a^2+3 = 9k
The Attempt at a Solution
Tried assuming not the case, so assumed a is an integer and 9 does not divide a^2 +3 to try to prove a contradiction showing that a can't be an integer in this case, but it went no where.