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Simplifying x4 + -1(2 + i) = 0 x4 + (2 * -1 + i * -1) = 0 x4 + (-2 + -1i) = 0 Reorder the terms: -2 + -1i + x4 = 0 Solving -2 + -1i + x4 = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '2' to each side of the equation. -2 + -1i + 2 + x4 = 0 + 2 Reorder the terms: -2 + 2 + -1i + x4 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1i + x4 = 0 + 2 -1i + x4 = 0 + 2 Combine like terms: 0 + 2 = 2 -1i + x4 = 2 Add '-1x4' to each side of the equation. -1i + x4 + -1x4 = 2 + -1x4 Combine like terms: x4 + -1x4 = 0 -1i + 0 = 2 + -1x4 -1i = 2 + -1x4 Divide each side by '-1'. i = -2 + x4 Simplifying i = -2 + x4
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