Assignment: Quadratic Expressions 12. Factor x' + 2x - 48. A. (x-8)(x + 6) C. (x + 12)(x -4) B. (x + 8)(x -6) D. (x - 12)(x+4) Application: 13. Carrie's notebook cover has an area represented by the expression 16.x - 9. When the expression is fully factored, the factors represent the dimensions of the cover. What are the actual dimensions of the cover if x = 7 cm? A. 18 cm by 10 cm C. 31 cm by 25 cm B. 24 cm by 18 cm D. 36 cm by 28 cm 14. The surface area of a rectangular lid for a box is 12x + 80x. When the expression is factored fully, the factors are the dimensions of the lid. What is an expression for the perimeter of the lid? A. 6x + 40 C. 14x + 40 B. 12r + 80 D. & + 80 15. The door of Jose's locker is rectangular and its area can be represented by the binomial 28y+ 420y. a) Write expressions for the dimensions of the locker door by fully factoring its area. [2] b) Find the dimensions of the door ify = 2 cm. [2] 16. Jane says the factors of the trinomial x -10x-24 are (x-6)(x-4). Is Jane correct? Explain and make corrections if necessary. [3] MFM2PO Page 2Application: 13. Carrie's notebook cover has an area represented by the expression 16x - 9. When the expression is fully factored, the factors represent the dimensions of the cover. What are the actual dimensions of the cover if x = 7 cm? A. 18 cm by 10 cm C. 31 cm by 25 cm B. 24 cm by 18 cm D. 36 cm by 28 cm 14. The surface area of a rectangular lid for a box is 12x + 80x. When the expression is factored fully, the factors are the dimensions of the lid. What is an expression for the perimeter of the lid? A. 6x + 40 C. 14x + 40 B. 12r + 80 D. & + 80 15. The door of Jose's locker is rectangular and its area can be represented by the binomial 28y + 420y a) Write expressions for the dimensions of the locker door by fully factoring its area. [2] b) Find the dimensions of the door ify = 2 cm. [2] 16. Jane says the factors of the trinomial x -10x-24 are (x-6)(x-4). Is Jane correct? Explain and make corrections if necessary. [3]