(4-2i)(1-2i)=

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Solution for (4-2i)(1-2i)= equation:


Simplifying
(4 + -2i)(1 + -2i) = 0

Multiply (4 + -2i) * (1 + -2i)
(4(1 + -2i) + -2i * (1 + -2i)) = 0
((1 * 4 + -2i * 4) + -2i * (1 + -2i)) = 0
((4 + -8i) + -2i * (1 + -2i)) = 0
(4 + -8i + (1 * -2i + -2i * -2i)) = 0
(4 + -8i + (-2i + 4i2)) = 0

Combine like terms: -8i + -2i = -10i
(4 + -10i + 4i2) = 0

Solving
4 + -10i + 4i2 = 0

Solving for variable 'i'.

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

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

Ignore the factor 2.

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 '(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 = {0.5, 2}

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