(x+5)(x-4i)=

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


Simplifying
(x + 5)(x + -4i) = 0

Reorder the terms:
(5 + x)(x + -4i) = 0

Reorder the terms:
(5 + x)(-4i + x) = 0

Multiply (5 + x) * (-4i + x)
(5(-4i + x) + x(-4i + x)) = 0
((-4i * 5 + x * 5) + x(-4i + x)) = 0
((-20i + 5x) + x(-4i + x)) = 0
(-20i + 5x + (-4i * x + x * x)) = 0
(-20i + 5x + (-4ix + x2)) = 0

Reorder the terms:
(-20i + -4ix + 5x + x2) = 0
(-20i + -4ix + 5x + x2) = 0

Solving
-20i + -4ix + 5x + x2 = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-5x' to each side of the equation.
-20i + -4ix + 5x + -5x + x2 = 0 + -5x

Combine like terms: 5x + -5x = 0
-20i + -4ix + 0 + x2 = 0 + -5x
-20i + -4ix + x2 = 0 + -5x
Remove the zero:
-20i + -4ix + x2 = -5x

Add '-1x2' to each side of the equation.
-20i + -4ix + x2 + -1x2 = -5x + -1x2

Combine like terms: x2 + -1x2 = 0
-20i + -4ix + 0 = -5x + -1x2
-20i + -4ix = -5x + -1x2

Reorder the terms:
-20i + -4ix + 5x + x2 = -5x + 5x + -1x2 + x2

Combine like terms: -5x + 5x = 0
-20i + -4ix + 5x + x2 = 0 + -1x2 + x2
-20i + -4ix + 5x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-20i + -4ix + 5x + x2 = 0

The solution to this equation could not be determined.

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