Question

In Exercises 38--45, complete the square and find the minimum or maximum value of the quadratic function.
38. y = x2 + 2x + 5         39. y = x2 - 6x + 9

40. y = -9x 2 +x             41. y = x2 + 6x + 2
42. y = 2x 2 - 4x - 7       43. y = -4x 2 + 3x + 8
44. y = 3x 2 + 12x - 5    45. y = 4x - 12x2





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