6. Factor x2 + 3x + 2, completely. A (x + 2)(x + 1) B. (x-2)(x - 1) C. (x - 2)(x + 1) D (x + 2)(x - 1) 7. Factor x3 - 27, completely. A. (x+3)(x2 – 3x + 9) C. (x - 3)(x2 + 3x + 9) B. (.x - 3)(x2 – 3x + 9) D. (x+3)(x2 + 3x + 9) 8. Factor completely: x2-81. A. (x + 9) (X - 9) x B. (x + 9) (x + 9) C. (x - 9) (x - 9) D. (x +81)(x - 1) 9. The width of a rectangular board measures x - 2 units, what is the length of the board if its area is x2 + 3x - 10 square units? A. x + 2 units B. x + 5 units C. X - 5 units D x + 10 units 10. A rectangular garden measures r2 + 7r + 10 square units, what are the dimensions (length and width) of the lot? A r - 5 and r + 2 units C. T +5 and r - 2 units В. r +5 and r + 2 units D. r + 10 and r + 1 units 11. Daniela's rectangular study table is 2x2 – 11x + 15 square units. She measured the length as 2x - 5 units and the width as x + 3 units. Is her measurement of the dimensions, correct? A. No, because the length should be 2x + 5 units. B. No, because the width should be x - 3 units. C No, because the length and width should be 2x + 5 and x + 3 units, respectively. D. Yes, the dimensions are correct. 12. Which of the following expressions is a rational algebraic expression? A B D a - b C. va yż + z3 ſat1 bt a 13. What rational algebraic expression is the quotient when you divide x2 - 49 by x - 7? 1 1 B А. D C. x - 7 x + 7 - 7 3x2-9x 14. Simplify x-3 C 1 B. X-3 D 3x A. 3x 3 5 15. What is the LCD of the rational expressions and -? 8x3y 12xy В. А. 24x’y" C. 4xy D. 96x*y* 4xy 10 7. 16. Find the LCD of 62-9 b+9 -JA X- x + 7 x - 3 х and​