What are the solutions to the nonlinear system of equations below ?

Which of the following are accepted without proof in a logical system? check all that apply.

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.