(4+3i)(-1-2i)=

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Solution for (4+3i)(-1-2i)= equation:


Simplifying
(4 + 3i)(-1 + -2i) = 0

Multiply (4 + 3i) * (-1 + -2i)
(4(-1 + -2i) + 3i * (-1 + -2i)) = 0
((-1 * 4 + -2i * 4) + 3i * (-1 + -2i)) = 0
((-4 + -8i) + 3i * (-1 + -2i)) = 0
(-4 + -8i + (-1 * 3i + -2i * 3i)) = 0
(-4 + -8i + (-3i + -6i2)) = 0

Combine like terms: -8i + -3i = -11i
(-4 + -11i + -6i2) = 0

Solving
-4 + -11i + -6i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(4 + 11i + 6i2) = 0

Factor a trinomial.
-1((4 + 3i)(1 + 2i)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(4 + 3i)' equal to zero and attempt to solve: Simplifying 4 + 3i = 0 Solving 4 + 3i = 0 Move all terms containing i to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3i = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3i = 0 + -4 3i = 0 + -4 Combine like terms: 0 + -4 = -4 3i = -4 Divide each side by '3'. i = -1.333333333 Simplifying i = -1.333333333

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 = {-1.333333333, -0.5}

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