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Simplifying (4 + 7i) + (-3 + 5i) = 1 + 12i Remove parenthesis around (4 + 7i) 4 + 7i + (-3 + 5i) = 1 + 12i Remove parenthesis around (-3 + 5i) 4 + 7i + -3 + 5i = 1 + 12i Reorder the terms: 4 + -3 + 7i + 5i = 1 + 12i Combine like terms: 4 + -3 = 1 1 + 7i + 5i = 1 + 12i Combine like terms: 7i + 5i = 12i 1 + 12i = 1 + 12i Add '-1' to each side of the equation. 1 + -1 + 12i = 1 + -1 + 12i Combine like terms: 1 + -1 = 0 0 + 12i = 1 + -1 + 12i 12i = 1 + -1 + 12i Combine like terms: 1 + -1 = 0 12i = 0 + 12i 12i = 12i Add '-12i' to each side of the equation. 12i + -12i = 12i + -12i Combine like terms: 12i + -12i = 0 0 = 12i + -12i Combine like terms: 12i + -12i = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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