Question -
Answer -
Let 2 тАУ 3 тИЪ5 is not an irrational number and let 2 тАУ 3 тИЪ5 is a rational number
Let 2 тАУ 3 тИЪ5 = a/b where a and b are positive prime integers
┬а
тЯ╣2bтИТa3b=тИЪ5
тИЪ5 is a rational
But тИЪ5 is an irrational number
Our supposition is wrong
2 тАУ 3 тИЪ5 is an irrational