7-8i+6i(3-4i)=

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Solution for 7-8i+6i(3-4i)= equation:


Simplifying
7 + -8i + 6i(3 + -4i) = 0
7 + -8i + (3 * 6i + -4i * 6i) = 0
7 + -8i + (18i + -24i2) = 0

Combine like terms: -8i + 18i = 10i
7 + 10i + -24i2 = 0

Solving
7 + 10i + -24i2 = 0

Solving for variable 'i'.

Begin completing the square.  Divide all terms by
-24 the coefficient of the squared term: 

Divide each side by '-24'.
-0.2916666667 + -0.4166666667i + i2 = 0

Move the constant term to the right:

Add '0.2916666667' to each side of the equation.
-0.2916666667 + -0.4166666667i + 0.2916666667 + i2 = 0 + 0.2916666667

Reorder the terms:
-0.2916666667 + 0.2916666667 + -0.4166666667i + i2 = 0 + 0.2916666667

Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000
0.0000000000 + -0.4166666667i + i2 = 0 + 0.2916666667
-0.4166666667i + i2 = 0 + 0.2916666667

Combine like terms: 0 + 0.2916666667 = 0.2916666667
-0.4166666667i + i2 = 0.2916666667

The i term is -0.4166666667i.  Take half its coefficient (-0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
-0.4166666667i + 0.04340277781 + i2 = 0.2916666667 + 0.04340277781

Reorder the terms:
0.04340277781 + -0.4166666667i + i2 = 0.2916666667 + 0.04340277781

Combine like terms: 0.2916666667 + 0.04340277781 = 0.33506944451
0.04340277781 + -0.4166666667i + i2 = 0.33506944451

Factor a perfect square on the left side:
(i + -0.2083333334)(i + -0.2083333334) = 0.33506944451

Calculate the square root of the right side: 0.578851833

Break this problem into two subproblems by setting 
(i + -0.2083333334) equal to 0.578851833 and -0.578851833.

Subproblem 1

i + -0.2083333334 = 0.578851833 Simplifying i + -0.2083333334 = 0.578851833 Reorder the terms: -0.2083333334 + i = 0.578851833 Solving -0.2083333334 + i = 0.578851833 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + i = 0.578851833 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + i = 0.578851833 + 0.2083333334 i = 0.578851833 + 0.2083333334 Combine like terms: 0.578851833 + 0.2083333334 = 0.7871851664 i = 0.7871851664 Simplifying i = 0.7871851664

Subproblem 2

i + -0.2083333334 = -0.578851833 Simplifying i + -0.2083333334 = -0.578851833 Reorder the terms: -0.2083333334 + i = -0.578851833 Solving -0.2083333334 + i = -0.578851833 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + i = -0.578851833 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + i = -0.578851833 + 0.2083333334 i = -0.578851833 + 0.2083333334 Combine like terms: -0.578851833 + 0.2083333334 = -0.3705184996 i = -0.3705184996 Simplifying i = -0.3705184996

Solution

The solution to the problem is based on the solutions from the subproblems. i = {0.7871851664, -0.3705184996}

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