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Simplifying (2 + -5i)(6 + 4i) = 0 Multiply (2 + -5i) * (6 + 4i) (2(6 + 4i) + -5i * (6 + 4i)) = 0 ((6 * 2 + 4i * 2) + -5i * (6 + 4i)) = 0 ((12 + 8i) + -5i * (6 + 4i)) = 0 (12 + 8i + (6 * -5i + 4i * -5i)) = 0 (12 + 8i + (-30i + -20i2)) = 0 Combine like terms: 8i + -30i = -22i (12 + -22i + -20i2) = 0 Solving 12 + -22i + -20i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '2'. 2(6 + -11i + -10i2) = 0 Factor a trinomial. 2((2 + -5i)(3 + 2i)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(2 + -5i)' equal to zero and attempt to solve: Simplifying 2 + -5i = 0 Solving 2 + -5i = 0 Move all terms containing i to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -5i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -5i = 0 + -2 -5i = 0 + -2 Combine like terms: 0 + -2 = -2 -5i = -2 Divide each side by '-5'. i = 0.4 Simplifying i = 0.4Subproblem 2
Set the factor '(3 + 2i)' equal to zero and attempt to solve: Simplifying 3 + 2i = 0 Solving 3 + 2i = 0 Move all terms containing i to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2i = 0 + -3 2i = 0 + -3 Combine like terms: 0 + -3 = -3 2i = -3 Divide each side by '2'. i = -1.5 Simplifying i = -1.5Solution
i = {0.4, -1.5}
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