Which of the following expressions is a rational expression?

B. (X^2 + 2)/(X - 3)

Which of the following is a factor of the polynomial x^2 + 6x + 9?

A. (X + 3)

Which of the following is a factor of the polynomial x^2 - 5x + 6?

A. X - 2

What is the L.C.M. of the polynomials x^2 - 1 and x^2 - 4?

A. (X - 1)(X + 1)(X - 2)(X + 2)

If the quadratic equation x^2 - 6x + 8 = 0 has roots r1 and r2, what is the value of r1 + r2?

B. 6