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Simplifying (-3 + -7i)(2 + i) = 0 Multiply (-3 + -7i) * (2 + i) (-3(2 + i) + -7i * (2 + i)) = 0 ((2 * -3 + i * -3) + -7i * (2 + i)) = 0 ((-6 + -3i) + -7i * (2 + i)) = 0 (-6 + -3i + (2 * -7i + i * -7i)) = 0 (-6 + -3i + (-14i + -7i2)) = 0 Combine like terms: -3i + -14i = -17i (-6 + -17i + -7i2) = 0 Solving -6 + -17i + -7i2 = 0 Solving for variable 'i'. Factor out the Greatest Common Factor (GCF), '-1'. -1(6 + 17i + 7i2) = 0 Factor a trinomial. -1((2 + i)(3 + 7i)) = 0 Ignore the factor -1.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 '(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 = {-2, -0.4285714286}
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