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Simplifying (-1)(4i) = 0 Remove parenthesis around (4i) -1 * 4i = 0 Multiply -1 * 4 -4i = 0 Solving -4i = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Divide each side by '-4'. i = 0 Simplifying i = 0
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