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Simplifying (7 + -7i) + -1(7 + -1i) = -6i Remove parenthesis around (7 + -7i) 7 + -7i + -1(7 + -1i) = -6i 7 + -7i + (7 * -1 + -1i * -1) = -6i 7 + -7i + (-7 + 1i) = -6i Reorder the terms: 7 + -7 + -7i + 1i = -6i Combine like terms: 7 + -7 = 0 0 + -7i + 1i = -6i -7i + 1i = -6i Combine like terms: -7i + 1i = -6i -6i = -6i Add '6i' to each side of the equation. -6i + 6i = -6i + 6i Combine like terms: -6i + 6i = 0 0 = -6i + 6i Combine like terms: -6i + 6i = 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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