(a-bi)(4-2i)=40

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Solution for (a-bi)(4-2i)=40 equation:


Simplifying
(a + -1bi)(4 + -2i) = 40

Multiply (a + -1bi) * (4 + -2i)
(a(4 + -2i) + -1bi * (4 + -2i)) = 40
((4 * a + -2i * a) + -1bi * (4 + -2i)) = 40
((4a + -2ai) + -1bi * (4 + -2i)) = 40
(4a + -2ai + (4 * -1bi + -2i * -1bi)) = 40
(4a + -2ai + (-4bi + 2bi2)) = 40
(4a + -2ai + -4bi + 2bi2) = 40

Solving
4a + -2ai + -4bi + 2bi2 = 40

Solving for variable 'a'.

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

Add '4bi' to each side of the equation.
4a + -2ai + -4bi + 4bi + 2bi2 = 40 + 4bi

Combine like terms: -4bi + 4bi = 0
4a + -2ai + 0 + 2bi2 = 40 + 4bi
4a + -2ai + 2bi2 = 40 + 4bi

Add '-2bi2' to each side of the equation.
4a + -2ai + 2bi2 + -2bi2 = 40 + 4bi + -2bi2

Combine like terms: 2bi2 + -2bi2 = 0
4a + -2ai + 0 = 40 + 4bi + -2bi2
4a + -2ai = 40 + 4bi + -2bi2

Reorder the terms:
-40 + 4a + -2ai + -4bi + 2bi2 = 40 + 4bi + -2bi2 + -40 + -4bi + 2bi2

Reorder the terms:
-40 + 4a + -2ai + -4bi + 2bi2 = 40 + -40 + 4bi + -4bi + -2bi2 + 2bi2

Combine like terms: 40 + -40 = 0
-40 + 4a + -2ai + -4bi + 2bi2 = 0 + 4bi + -4bi + -2bi2 + 2bi2
-40 + 4a + -2ai + -4bi + 2bi2 = 4bi + -4bi + -2bi2 + 2bi2

Combine like terms: 4bi + -4bi = 0
-40 + 4a + -2ai + -4bi + 2bi2 = 0 + -2bi2 + 2bi2
-40 + 4a + -2ai + -4bi + 2bi2 = -2bi2 + 2bi2

Combine like terms: -2bi2 + 2bi2 = 0
-40 + 4a + -2ai + -4bi + 2bi2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-20 + 2a + -1ai + -2bi + bi2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-20 + 2a + -1ai + -2bi + bi2)' equal to zero and attempt to solve: Simplifying -20 + 2a + -1ai + -2bi + bi2 = 0 Solving -20 + 2a + -1ai + -2bi + bi2 = 0 Move all terms containing a to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 2a + -1ai + -2bi + 20 + bi2 = 0 + 20 Reorder the terms: -20 + 20 + 2a + -1ai + -2bi + bi2 = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 2a + -1ai + -2bi + bi2 = 0 + 20 2a + -1ai + -2bi + bi2 = 0 + 20 Combine like terms: 0 + 20 = 20 2a + -1ai + -2bi + bi2 = 20 Add '2bi' to each side of the equation. 2a + -1ai + -2bi + 2bi + bi2 = 20 + 2bi Combine like terms: -2bi + 2bi = 0 2a + -1ai + 0 + bi2 = 20 + 2bi 2a + -1ai + bi2 = 20 + 2bi Add '-1bi2' to each side of the equation. 2a + -1ai + bi2 + -1bi2 = 20 + 2bi + -1bi2 Combine like terms: bi2 + -1bi2 = 0 2a + -1ai + 0 = 20 + 2bi + -1bi2 2a + -1ai = 20 + 2bi + -1bi2 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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