(-2-8i)(8-7i)=0

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Solution for (-2-8i)(8-7i)=0 equation:


Simplifying
(-2 + -8i)(8 + -7i) = 0

Multiply (-2 + -8i) * (8 + -7i)
(-2(8 + -7i) + -8i * (8 + -7i)) = 0
((8 * -2 + -7i * -2) + -8i * (8 + -7i)) = 0
((-16 + 14i) + -8i * (8 + -7i)) = 0
(-16 + 14i + (8 * -8i + -7i * -8i)) = 0
(-16 + 14i + (-64i + 56i2)) = 0

Combine like terms: 14i + -64i = -50i
(-16 + -50i + 56i2) = 0

Solving
-16 + -50i + 56i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-8 + -25i + 28i2) = 0

Factor a trinomial.
2((-1 + -4i)(8 + -7i)) = 0

Ignore the factor 2.

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 '(8 + -7i)' equal to zero and attempt to solve: Simplifying 8 + -7i = 0 Solving 8 + -7i = 0 Move all terms containing i to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -7i = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7i = 0 + -8 -7i = 0 + -8 Combine like terms: 0 + -8 = -8 -7i = -8 Divide each side by '-7'. i = 1.142857143 Simplifying i = 1.142857143

Solution

i = {-0.25, 1.142857143}

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