(5-10i)(3+5i)=

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Solution for (5-10i)(3+5i)= equation:


Simplifying
(5 + -10i)(3 + 5i) = 0

Multiply (5 + -10i) * (3 + 5i)
(5(3 + 5i) + -10i * (3 + 5i)) = 0
((3 * 5 + 5i * 5) + -10i * (3 + 5i)) = 0
((15 + 25i) + -10i * (3 + 5i)) = 0
(15 + 25i + (3 * -10i + 5i * -10i)) = 0
(15 + 25i + (-30i + -50i2)) = 0

Combine like terms: 25i + -30i = -5i
(15 + -5i + -50i2) = 0

Solving
15 + -5i + -50i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '5'.
5(3 + -1i + -10i2) = 0

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

Ignore the factor 5.

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 = 0.5

Subproblem 2

Set the factor '(3 + 5i)' equal to zero and attempt to solve: Simplifying 3 + 5i = 0 Solving 3 + 5i = 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 + 5i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 5i = 0 + -3 5i = 0 + -3 Combine like terms: 0 + -3 = -3 5i = -3 Divide each side by '5'. i = -0.6 Simplifying i = -0.6

Solution

i = {0.5, -0.6}

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