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Simplifying (3 + 7i)(6 + -2i) = 0 Multiply (3 + 7i) * (6 + -2i) (3(6 + -2i) + 7i * (6 + -2i)) = 0 ((6 * 3 + -2i * 3) + 7i * (6 + -2i)) = 0 ((18 + -6i) + 7i * (6 + -2i)) = 0 (18 + -6i + (6 * 7i + -2i * 7i)) = 0 (18 + -6i + (42i + -14i2)) = 0 Combine like terms: -6i + 42i = 36i (18 + 36i + -14i2) = 0 Solving 18 + 36i + -14i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '2'. 2(9 + 18i + -7i2) = 0 Factor a trinomial. 2((3 + -1i)(3 + 7i)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(3 + -1i)' equal to zero and attempt to solve: Simplifying 3 + -1i = 0 Solving 3 + -1i = 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 + -1i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1i = 0 + -3 -1i = 0 + -3 Combine like terms: 0 + -3 = -3 -1i = -3 Divide each side by '-1'. i = 3 Simplifying i = 3Subproblem 2
Set the factor '(3 + 7i)' equal to zero and attempt to solve: Simplifying 3 + 7i = 0 Solving 3 + 7i = 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 + 7i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 7i = 0 + -3 7i = 0 + -3 Combine like terms: 0 + -3 = -3 7i = -3 Divide each side by '7'. i = -0.4285714286 Simplifying i = -0.4285714286Solution
i = {3, -0.4285714286}
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