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Simplifying (7 + -2i) + (4 + -5i) = 0 Remove parenthesis around (7 + -2i) 7 + -2i + (4 + -5i) = 0 Remove parenthesis around (4 + -5i) 7 + -2i + 4 + -5i = 0 Reorder the terms: 7 + 4 + -2i + -5i = 0 Combine like terms: 7 + 4 = 11 11 + -2i + -5i = 0 Combine like terms: -2i + -5i = -7i 11 + -7i = 0 Solving 11 + -7i = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + -7i = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -7i = 0 + -11 -7i = 0 + -11 Combine like terms: 0 + -11 = -11 -7i = -11 Divide each side by '-7'. i = 1.571428571 Simplifying i = 1.571428571
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