6) Which of the following represents a ratio of two polynomials? A. (x+1)+(x-3) B. (x+1)-(x-3) C. (x+1)(x-3) 7) Which of the following is the simpliest form of the rational expression (x+1) (x-3) X +5 2 5+x +5 A. -1 B. 1 C. 2 5+ x2-1 8) In the rational algebraic expression what factor is common to both numerator and denominator? x2–2x+1' A. X+1 B. X - 1 c.x² - D. x2 + 1 9) Which of the following is the simplest form of x2+2x+1 x²-1 x+1 X+1 1-X X-1 C. 1-Y B. 10) Which of the following is the simplest form of a2 1-22 A. O B. 1 C. -1 D. 2​