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Simplifying (2 + -5i)(1 + -1i) + -1(4 + -1i)(4 + i) = 0 Multiply (2 + -5i) * (1 + -1i) (2(1 + -1i) + -5i * (1 + -1i)) + -1(4 + -1i)(4 + i) = 0 ((1 * 2 + -1i * 2) + -5i * (1 + -1i)) + -1(4 + -1i)(4 + i) = 0 ((2 + -2i) + -5i * (1 + -1i)) + -1(4 + -1i)(4 + i) = 0 (2 + -2i + (1 * -5i + -1i * -5i)) + -1(4 + -1i)(4 + i) = 0 (2 + -2i + (-5i + 5i2)) + -1(4 + -1i)(4 + i) = 0 Combine like terms: -2i + -5i = -7i (2 + -7i + 5i2) + -1(4 + -1i)(4 + i) = 0 Multiply (4 + -1i) * (4 + i) 2 + -7i + 5i2 + -1(4(4 + i) + -1i * (4 + i)) = 0 2 + -7i + 5i2 + -1((4 * 4 + i * 4) + -1i * (4 + i)) = 0 2 + -7i + 5i2 + -1((16 + 4i) + -1i * (4 + i)) = 0 2 + -7i + 5i2 + -1(16 + 4i + (4 * -1i + i * -1i)) = 0 2 + -7i + 5i2 + -1(16 + 4i + (-4i + -1i2)) = 0 Combine like terms: 4i + -4i = 0 2 + -7i + 5i2 + -1(16 + 0 + -1i2) = 0 2 + -7i + 5i2 + -1(16 + -1i2) = 0 2 + -7i + 5i2 + (16 * -1 + -1i2 * -1) = 0 2 + -7i + 5i2 + (-16 + 1i2) = 0 Reorder the terms: 2 + -16 + -7i + 5i2 + 1i2 = 0 Combine like terms: 2 + -16 = -14 -14 + -7i + 5i2 + 1i2 = 0 Combine like terms: 5i2 + 1i2 = 6i2 -14 + -7i + 6i2 = 0 Solving -14 + -7i + 6i2 = 0 Solving for variable 'i'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -2.333333333 + -1.166666667i + i2 = 0 Move the constant term to the right: Add '2.333333333' to each side of the equation. -2.333333333 + -1.166666667i + 2.333333333 + i2 = 0 + 2.333333333 Reorder the terms: -2.333333333 + 2.333333333 + -1.166666667i + i2 = 0 + 2.333333333 Combine like terms: -2.333333333 + 2.333333333 = 0.000000000 0.000000000 + -1.166666667i + i2 = 0 + 2.333333333 -1.166666667i + i2 = 0 + 2.333333333 Combine like terms: 0 + 2.333333333 = 2.333333333 -1.166666667i + i2 = 2.333333333 The i term is -1.166666667i. Take half its coefficient (-0.5833333335). Square it (0.3402777780) and add it to both sides. Add '0.3402777780' to each side of the equation. -1.166666667i + 0.3402777780 + i2 = 2.333333333 + 0.3402777780 Reorder the terms: 0.3402777780 + -1.166666667i + i2 = 2.333333333 + 0.3402777780 Combine like terms: 2.333333333 + 0.3402777780 = 2.673611111 0.3402777780 + -1.166666667i + i2 = 2.673611111 Factor a perfect square on the left side: (i + -0.5833333335)(i + -0.5833333335) = 2.673611111 Calculate the square root of the right side: 1.635118072 Break this problem into two subproblems by setting (i + -0.5833333335) equal to 1.635118072 and -1.635118072.Subproblem 1
i + -0.5833333335 = 1.635118072 Simplifying i + -0.5833333335 = 1.635118072 Reorder the terms: -0.5833333335 + i = 1.635118072 Solving -0.5833333335 + i = 1.635118072 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + i = 1.635118072 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + i = 1.635118072 + 0.5833333335 i = 1.635118072 + 0.5833333335 Combine like terms: 1.635118072 + 0.5833333335 = 2.2184514055 i = 2.2184514055 Simplifying i = 2.2184514055Subproblem 2
i + -0.5833333335 = -1.635118072 Simplifying i + -0.5833333335 = -1.635118072 Reorder the terms: -0.5833333335 + i = -1.635118072 Solving -0.5833333335 + i = -1.635118072 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + i = -1.635118072 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + i = -1.635118072 + 0.5833333335 i = -1.635118072 + 0.5833333335 Combine like terms: -1.635118072 + 0.5833333335 = -1.0517847385 i = -1.0517847385 Simplifying i = -1.0517847385Solution
The solution to the problem is based on the solutions from the subproblems. i = {2.2184514055, -1.0517847385}
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