Which of the mathematical statements below are TRUE? Choose all that apply. For any two sets A and B we have that Bn (AB) = 0 (the empty set). The sum of two irrational numbers is irrational. Any subset of R has the largest element. The quadratic equation ax2 + bx + c = 0 has a real solution if and only if b2 4ac 0. - Any natural number is either even or odd.