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Simplifying (3 + 6i)(-2 + 7i) = 0 Multiply (3 + 6i) * (-2 + 7i) (3(-2 + 7i) + 6i * (-2 + 7i)) = 0 ((-2 * 3 + 7i * 3) + 6i * (-2 + 7i)) = 0 ((-6 + 21i) + 6i * (-2 + 7i)) = 0 (-6 + 21i + (-2 * 6i + 7i * 6i)) = 0 (-6 + 21i + (-12i + 42i2)) = 0 Combine like terms: 21i + -12i = 9i (-6 + 9i + 42i2) = 0 Solving -6 + 9i + 42i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '3'. 3(-2 + 3i + 14i2) = 0 Factor a trinomial. 3((-1 + -2i)(2 + -7i)) = 0 Ignore the factor 3.Subproblem 1
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 = -0.5Subproblem 2
Set the factor '(2 + -7i)' equal to zero and attempt to solve: Simplifying 2 + -7i = 0 Solving 2 + -7i = 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 + -7i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7i = 0 + -2 -7i = 0 + -2 Combine like terms: 0 + -2 = -2 -7i = -2 Divide each side by '-7'. i = 0.2857142857 Simplifying i = 0.2857142857Solution
i = {-0.5, 0.2857142857}
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