f(x)=(x+3)(x+4i)

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Solution for f(x)=(x+3)(x+4i) equation:


Simplifying
f(x) = (x + 3)(x + 4i)

Multiply f * x
fx = (x + 3)(x + 4i)

Reorder the terms:
fx = (3 + x)(x + 4i)

Reorder the terms:
fx = (3 + x)(4i + x)

Multiply (3 + x) * (4i + x)
fx = (3(4i + x) + x(4i + x))
fx = ((4i * 3 + x * 3) + x(4i + x))
fx = ((12i + 3x) + x(4i + x))
fx = (12i + 3x + (4i * x + x * x))
fx = (12i + 3x + (4ix + x2))

Reorder the terms:
fx = (12i + 4ix + 3x + x2)
fx = (12i + 4ix + 3x + x2)

Solving
fx = 12i + 4ix + 3x + x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 12ix-1 + 4i + 3 + x

Simplifying
f = 12ix-1 + 4i + 3 + x

Reorder the terms:
f = 3 + 4i + 12ix-1 + x

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