(-5-9i)(6+4i)=

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Solution for (-5-9i)(6+4i)= equation:


Simplifying
(-5 + -9i)(6 + 4i) = 0

Multiply (-5 + -9i) * (6 + 4i)
(-5(6 + 4i) + -9i * (6 + 4i)) = 0
((6 * -5 + 4i * -5) + -9i * (6 + 4i)) = 0
((-30 + -20i) + -9i * (6 + 4i)) = 0
(-30 + -20i + (6 * -9i + 4i * -9i)) = 0
(-30 + -20i + (-54i + -36i2)) = 0

Combine like terms: -20i + -54i = -74i
(-30 + -74i + -36i2) = 0

Solving
-30 + -74i + -36i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '-2'.
-2(15 + 37i + 18i2) = 0

Factor a trinomial.
-2((3 + 2i)(5 + 9i)) = 0

Ignore the factor -2.

Subproblem 1

Set the factor '(3 + 2i)' equal to zero and attempt to solve: Simplifying 3 + 2i = 0 Solving 3 + 2i = 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 + 2i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2i = 0 + -3 2i = 0 + -3 Combine like terms: 0 + -3 = -3 2i = -3 Divide each side by '2'. i = -1.5 Simplifying i = -1.5

Subproblem 2

Set the factor '(5 + 9i)' equal to zero and attempt to solve: Simplifying 5 + 9i = 0 Solving 5 + 9i = 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 + 9i = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 9i = 0 + -5 9i = 0 + -5 Combine like terms: 0 + -5 = -5 9i = -5 Divide each side by '9'. i = -0.5555555556 Simplifying i = -0.5555555556

Solution

i = {-1.5, -0.5555555556}

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