Quadratic Equations with Complex Solutions Exercises 65-82: Checking Symbolic Skills Solve. Write answers in standard form. 65. x^2 + 5 = 0 66. 4x^2 + 3 = 0 67. 5x^2 + 1 = 3x^2 68. x(3x + 1) = -1 69. 3x = 5x^2 + 1 70. 4x^2 = x - 1 71. x(x - 4) = -5 72. 2x^2 + x + 1 = 0 73. x^2 = 3x - 5 74. 6x - 2x^2 = 10 75. x^2 + 2x + 4 = 0 76. x(x - 4) = -8 77. 3x^2 - 4x = x^2 - 3 78. 2x^2 + 3 = 1 - x 79. 2x(x - 2) = x - 4 80. 3x^2 + x = x(5 - x) - 2 81. 3x(3 - x) - 8 = x(x - 2) 82. -x(7 - 2x) = -6 - (3 - x)
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### 66. Solve the equation: \(4r^2 + 3 = 0\) ** Show more…
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