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Simplifying (5 + 3i)(4 + 2i) = 0 Multiply (5 + 3i) * (4 + 2i) (5(4 + 2i) + 3i * (4 + 2i)) = 0 ((4 * 5 + 2i * 5) + 3i * (4 + 2i)) = 0 ((20 + 10i) + 3i * (4 + 2i)) = 0 (20 + 10i + (4 * 3i + 2i * 3i)) = 0 (20 + 10i + (12i + 6i2)) = 0 Combine like terms: 10i + 12i = 22i (20 + 22i + 6i2) = 0 Solving 20 + 22i + 6i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '2'. 2(10 + 11i + 3i2) = 0 Factor a trinomial. 2((2 + i)(5 + 3i)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(2 + i)' equal to zero and attempt to solve: Simplifying 2 + i = 0 Solving 2 + i = 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 + i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + i = 0 + -2 i = 0 + -2 Combine like terms: 0 + -2 = -2 i = -2 Simplifying i = -2Subproblem 2
Set the factor '(5 + 3i)' equal to zero and attempt to solve: Simplifying 5 + 3i = 0 Solving 5 + 3i = 0 Move all terms containing i to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3i = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3i = 0 + -5 3i = 0 + -5 Combine like terms: 0 + -5 = -5 3i = -5 Divide each side by '3'. i = -1.666666667 Simplifying i = -1.666666667Solution
i = {-2, -1.666666667}
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