In Exercises 67-74, solve each quadratic equation by completing the square. 67. x + 6x = 7 68. x + 6x = -8 69. x? - 2x = 2 70. x + 4x = 12 %3D 71. x - 6x – 11 = 0 72. x - 2r - 5 = 0 74. x + 6x - 5 = 0 73. x + 4x + 1 = 0

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