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Simplifying (3 + 6i)(4 + -7i) = 0 Multiply (3 + 6i) * (4 + -7i) (3(4 + -7i) + 6i * (4 + -7i)) = 0 ((4 * 3 + -7i * 3) + 6i * (4 + -7i)) = 0 ((12 + -21i) + 6i * (4 + -7i)) = 0 (12 + -21i + (4 * 6i + -7i * 6i)) = 0 (12 + -21i + (24i + -42i2)) = 0 Combine like terms: -21i + 24i = 3i (12 + 3i + -42i2) = 0 Solving 12 + 3i + -42i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '3'. 3(4 + i + -14i2) = 0 Factor a trinomial. 3((4 + -7i)(1 + 2i)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(4 + -7i)' equal to zero and attempt to solve: Simplifying 4 + -7i = 0 Solving 4 + -7i = 0 Move all terms containing i to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -7i = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7i = 0 + -4 -7i = 0 + -4 Combine like terms: 0 + -4 = -4 -7i = -4 Divide each side by '-7'. i = 0.5714285714 Simplifying i = 0.5714285714Subproblem 2
Set the factor '(1 + 2i)' equal to zero and attempt to solve: Simplifying 1 + 2i = 0 Solving 1 + 2i = 0 Move all terms containing i to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2i = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2i = 0 + -1 2i = 0 + -1 Combine like terms: 0 + -1 = -1 2i = -1 Divide each side by '2'. i = -0.5 Simplifying i = -0.5Solution
i = {0.5714285714, -0.5}
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