49,55,61

39. 2x2 + 2x + 5 = 0 40. 5x2 - 8x + 5 = 0 41. 5x2 + 6x + 2 = 0 42. 2x2 - 6x + 5 = 0 43. x2 + x+ 2=0 44. x2 - 2x + 4 = 0 For the following exercises, use the vertex (h, k) and a point on the graph (x, y) to find the general form of the equation of the quadratic function. 45. (h, k) = (2, 0), (x, y) = (4, 4) 46. (h, k) = (-2, -1), (x, y) = (-4,3) 47. (h, k) = (0, 1), (x, y) = (2, 5) 48. (h, k) = (2, 3), (x, y) = (5, 12) 49. (h, k) = (-5, 3), (x, y) = (2, 9) 50. (h, k) = (3, 2), (x, y) = (10, 1) 51. (h, k) = (0, 1), (x, y) = (1, 0) 52. (h, k) = (1, 0), (x, y) = (0, 1) CHAPTER 3 POLYNOMIAL AND RATIONAL FUNCTIONS APHICAL the following exercises, sketch a graph of the quadratic function and give the vertex, axis of symmetry, and ercepts. 3. f(x) = x2 -2x 54. f(x) = x2 - 6x - 1 55. f(x) = x2 - 5x - 6 . f(x) = x2 - 7x+3 57. f(x) = -2x2 + 5x -8 58. f(x) = 4x2 - 12x - 3 the following exercises, write the equation for the graphed function. 60. 61. X -3 2 -1, -5 -4- 2 63. y 64