NAME DATE PERIO 6 Chapter 6 Test, Form 2A (continued) 11. The quadratic equation x2 - 8x = -20 is to be solved by completing the square. Which equation would be a step in that solution? A. (x - 4)2 = 4 B. x - 4 = +2i C. x2 - 8x + 20 = 0 D. x2 - 8x + 16 = -20 12. Find the exact solutions to 3x2 = 5x - 1 by using the Quadratic Formula. A -5+ V13 B. 5 + V13 C. 5 # V37 D. 5 + V13 6 3 6 6 For Questions 13 and 14, use the value of the discriminant to determine the number and type of roots for each equation. 13. 2x2 - 7x + 9 = 0 A. 2 real, rational B. 2 real, irrational C. 2 complex D. 1 real, rational 14. x2 + 20 = 12x - 16 A. 1 real, irrational B. 2 real, rational C. no real D. 1 real, rational 15. Identify the vertex, axis of symmetry, and direction of opening for y = =(x - 8)2+2. A. (-8, 2); x = -8; up B. (-8, -2); x= -8; down C. (8, -2); x = 8; up D. (8, 2); x = 8; up 16. Which quadratic function has its vertex at (-2, 7) and opens down? A. y = -3(x +2)2+ 7 B. y = (x -2)2+7 C. y = -12(x + 2)2 - 7 D. y = -2(x -2)2+7 17. Write y = x2 + 4x - 1 in vertex form. A. y = (x -2)2+5 B. y = (x+2)2-5 C. y = (x+2)2 - 1 D. y = (x + 2)2+3 18. Write an equation for the parabola whose vertex is at (-8, 4) and passes through (-6, -2). A. y = - -3 (x + 8)2+ 4 B. y = --(x + 8)2+4 C. y = (x + 6)2 - 2 D. y = 2 3 (x - 8)2 + 4 19. Which quadratic inequality is graphed at the right? A. y z (x - 2)(x + 3) B. y> (x - 2)(x+ 3) C. y> (x +2)(x - 3) D. y