(2-4i)(-7+I)=

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Solution for (2-4i)(-7+I)= equation:


Simplifying
(2 + -4i)(-7 + I) = 0

Multiply (2 + -4i) * (-7 + I)
(2(-7 + I) + -4i * (-7 + I)) = 0
((-7 * 2 + I * 2) + -4i * (-7 + I)) = 0
((-14 + 2I) + -4i * (-7 + I)) = 0
(-14 + 2I + (-7 * -4i + I * -4i)) = 0
(-14 + 2I + (28i + -4iI)) = 0
(-14 + 2I + 28i + -4iI) = 0

Solving
-14 + 2I + 28i + -4iI = 0

Solving for variable 'I'.

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

Add '14' to each side of the equation.
-14 + 2I + 28i + 14 + -4iI = 0 + 14

Reorder the terms:
-14 + 14 + 2I + 28i + -4iI = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 2I + 28i + -4iI = 0 + 14
2I + 28i + -4iI = 0 + 14

Combine like terms: 0 + 14 = 14
2I + 28i + -4iI = 14

Add '-28i' to each side of the equation.
2I + 28i + -28i + -4iI = 14 + -28i

Combine like terms: 28i + -28i = 0
2I + 0 + -4iI = 14 + -28i
2I + -4iI = 14 + -28i

Reorder the terms:
-14 + 2I + 28i + -4iI = 14 + -28i + -14 + 28i

Reorder the terms:
-14 + 2I + 28i + -4iI = 14 + -14 + -28i + 28i

Combine like terms: 14 + -14 = 0
-14 + 2I + 28i + -4iI = 0 + -28i + 28i
-14 + 2I + 28i + -4iI = -28i + 28i

Combine like terms: -28i + 28i = 0
-14 + 2I + 28i + -4iI = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-7 + I + 14i + -2iI) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-7 + I + 14i + -2iI)' equal to zero and attempt to solve: Simplifying -7 + I + 14i + -2iI = 0 Solving -7 + I + 14i + -2iI = 0 Move all terms containing I to the left, all other terms to the right. Add '7' to each side of the equation. -7 + I + 14i + 7 + -2iI = 0 + 7 Reorder the terms: -7 + 7 + I + 14i + -2iI = 0 + 7 Combine like terms: -7 + 7 = 0 0 + I + 14i + -2iI = 0 + 7 I + 14i + -2iI = 0 + 7 Combine like terms: 0 + 7 = 7 I + 14i + -2iI = 7 Add '-14i' to each side of the equation. I + 14i + -14i + -2iI = 7 + -14i Combine like terms: 14i + -14i = 0 I + 0 + -2iI = 7 + -14i I + -2iI = 7 + -14i The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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