(-5-2i)*(3+7i)=0

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Solution for (-5-2i)*(3+7i)=0 equation:


Simplifying
(-5 + -2i)(3 + 7i) = 0

Multiply (-5 + -2i) * (3 + 7i)
(-5(3 + 7i) + -2i * (3 + 7i)) = 0
((3 * -5 + 7i * -5) + -2i * (3 + 7i)) = 0
((-15 + -35i) + -2i * (3 + 7i)) = 0
(-15 + -35i + (3 * -2i + 7i * -2i)) = 0
(-15 + -35i + (-6i + -14i2)) = 0

Combine like terms: -35i + -6i = -41i
(-15 + -41i + -14i2) = 0

Solving
-15 + -41i + -14i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(15 + 41i + 14i2) = 0

Factor a trinomial.
-1((5 + 2i)(3 + 7i)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(5 + 2i)' equal to zero and attempt to solve: Simplifying 5 + 2i = 0 Solving 5 + 2i = 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 + 2i = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2i = 0 + -5 2i = 0 + -5 Combine like terms: 0 + -5 = -5 2i = -5 Divide each side by '2'. i = -2.5 Simplifying i = -2.5

Subproblem 2

Set the factor '(3 + 7i)' equal to zero and attempt to solve: Simplifying 3 + 7i = 0 Solving 3 + 7i = 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 + 7i = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 7i = 0 + -3 7i = 0 + -3 Combine like terms: 0 + -3 = -3 7i = -3 Divide each side by '7'. i = -0.4285714286 Simplifying i = -0.4285714286

Solution

i = {-2.5, -0.4285714286}

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