j^2-2j-41=0

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Solution for j^2-2j-41=0 equation:


Simplifying
j2 + -2j + -41 = 0

Reorder the terms:
-41 + -2j + j2 = 0

Solving
-41 + -2j + j2 = 0

Solving for variable 'j'.

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + -2j + 41 + j2 = 0 + 41

Reorder the terms:
-41 + 41 + -2j + j2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + -2j + j2 = 0 + 41
-2j + j2 = 0 + 41

Combine like terms: 0 + 41 = 41
-2j + j2 = 41

The j term is -2j.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2j + 1 + j2 = 41 + 1

Reorder the terms:
1 + -2j + j2 = 41 + 1

Combine like terms: 41 + 1 = 42
1 + -2j + j2 = 42

Factor a perfect square on the left side:
(j + -1)(j + -1) = 42

Calculate the square root of the right side: 6.480740698

Break this problem into two subproblems by setting 
(j + -1) equal to 6.480740698 and -6.480740698.

Subproblem 1

j + -1 = 6.480740698 Simplifying j + -1 = 6.480740698 Reorder the terms: -1 + j = 6.480740698 Solving -1 + j = 6.480740698 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + j = 6.480740698 + 1 Combine like terms: -1 + 1 = 0 0 + j = 6.480740698 + 1 j = 6.480740698 + 1 Combine like terms: 6.480740698 + 1 = 7.480740698 j = 7.480740698 Simplifying j = 7.480740698

Subproblem 2

j + -1 = -6.480740698 Simplifying j + -1 = -6.480740698 Reorder the terms: -1 + j = -6.480740698 Solving -1 + j = -6.480740698 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + j = -6.480740698 + 1 Combine like terms: -1 + 1 = 0 0 + j = -6.480740698 + 1 j = -6.480740698 + 1 Combine like terms: -6.480740698 + 1 = -5.480740698 j = -5.480740698 Simplifying j = -5.480740698

Solution

The solution to the problem is based on the solutions from the subproblems. j = {7.480740698, -5.480740698}

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