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Simplifying (3 + -4i)(7 + 2i) = 0 Multiply (3 + -4i) * (7 + 2i) (3(7 + 2i) + -4i * (7 + 2i)) = 0 ((7 * 3 + 2i * 3) + -4i * (7 + 2i)) = 0 ((21 + 6i) + -4i * (7 + 2i)) = 0 (21 + 6i + (7 * -4i + 2i * -4i)) = 0 (21 + 6i + (-28i + -8i2)) = 0 Combine like terms: 6i + -28i = -22i (21 + -22i + -8i2) = 0 Solving 21 + -22i + -8i2 = 0 Solving for variable 'i'. Factor a trinomial. (3 + -4i)(7 + 2i) = 0Subproblem 1
Set the factor '(3 + -4i)' equal to zero and attempt to solve: Simplifying 3 + -4i = 0 Solving 3 + -4i = 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 + -4i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4i = 0 + -3 -4i = 0 + -3 Combine like terms: 0 + -3 = -3 -4i = -3 Divide each side by '-4'. i = 0.75 Simplifying i = 0.75Subproblem 2
Set the factor '(7 + 2i)' equal to zero and attempt to solve: Simplifying 7 + 2i = 0 Solving 7 + 2i = 0 Move all terms containing i to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2i = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2i = 0 + -7 2i = 0 + -7 Combine like terms: 0 + -7 = -7 2i = -7 Divide each side by '2'. i = -3.5 Simplifying i = -3.5Solution
i = {0.75, -3.5}
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