(4-2i)(-2-8i)=

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Solution for (4-2i)(-2-8i)= equation:


Simplifying
(4 + -2i)(-2 + -8i) = 0

Multiply (4 + -2i) * (-2 + -8i)
(4(-2 + -8i) + -2i * (-2 + -8i)) = 0
((-2 * 4 + -8i * 4) + -2i * (-2 + -8i)) = 0
((-8 + -32i) + -2i * (-2 + -8i)) = 0
(-8 + -32i + (-2 * -2i + -8i * -2i)) = 0
(-8 + -32i + (4i + 16i2)) = 0

Combine like terms: -32i + 4i = -28i
(-8 + -28i + 16i2) = 0

Solving
-8 + -28i + 16i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-2 + -7i + 4i2) = 0

Factor a trinomial.
4((-1 + -4i)(2 + -1i)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-1 + -4i)' equal to zero and attempt to solve: Simplifying -1 + -4i = 0 Solving -1 + -4i = 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 + -4i = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -4i = 0 + 1 -4i = 0 + 1 Combine like terms: 0 + 1 = 1 -4i = 1 Divide each side by '-4'. i = -0.25 Simplifying i = -0.25

Subproblem 2

Set the factor '(2 + -1i)' equal to zero and attempt to solve: Simplifying 2 + -1i = 0 Solving 2 + -1i = 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 + -1i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1i = 0 + -2 -1i = 0 + -2 Combine like terms: 0 + -2 = -2 -1i = -2 Divide each side by '-1'. i = 2 Simplifying i = 2

Solution

i = {-0.25, 2}

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