(5-3i)(2+4i)=

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Solution for (5-3i)(2+4i)= equation:


Simplifying
(5 + -3i)(2 + 4i) = 0

Multiply (5 + -3i) * (2 + 4i)
(5(2 + 4i) + -3i * (2 + 4i)) = 0
((2 * 5 + 4i * 5) + -3i * (2 + 4i)) = 0
((10 + 20i) + -3i * (2 + 4i)) = 0
(10 + 20i + (2 * -3i + 4i * -3i)) = 0
(10 + 20i + (-6i + -12i2)) = 0

Combine like terms: 20i + -6i = 14i
(10 + 14i + -12i2) = 0

Solving
10 + 14i + -12i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '2'.
2(5 + 7i + -6i2) = 0

Factor a trinomial.
2((5 + -3i)(1 + 2i)) = 0

Ignore the factor 2.

Subproblem 1

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 = 1.666666667

Subproblem 2

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 = -0.5

Solution

i = {1.666666667, -0.5}

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