j^2-14j=27

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Solution for j^2-14j=27 equation:


Simplifying
j2 + -14j = 27

Reorder the terms:
-14j + j2 = 27

Solving
-14j + j2 = 27

Solving for variable 'j'.

Reorder the terms:
-27 + -14j + j2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -14j + j2 = 0

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -14j + 27 + j2 = 0 + 27

Reorder the terms:
-27 + 27 + -14j + j2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -14j + j2 = 0 + 27
-14j + j2 = 0 + 27

Combine like terms: 0 + 27 = 27
-14j + j2 = 27

The j term is -14j.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14j + 49 + j2 = 27 + 49

Reorder the terms:
49 + -14j + j2 = 27 + 49

Combine like terms: 27 + 49 = 76
49 + -14j + j2 = 76

Factor a perfect square on the left side:
(j + -7)(j + -7) = 76

Calculate the square root of the right side: 8.717797887

Break this problem into two subproblems by setting 
(j + -7) equal to 8.717797887 and -8.717797887.

Subproblem 1

j + -7 = 8.717797887 Simplifying j + -7 = 8.717797887 Reorder the terms: -7 + j = 8.717797887 Solving -7 + j = 8.717797887 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + j = 8.717797887 + 7 Combine like terms: -7 + 7 = 0 0 + j = 8.717797887 + 7 j = 8.717797887 + 7 Combine like terms: 8.717797887 + 7 = 15.717797887 j = 15.717797887 Simplifying j = 15.717797887

Subproblem 2

j + -7 = -8.717797887 Simplifying j + -7 = -8.717797887 Reorder the terms: -7 + j = -8.717797887 Solving -7 + j = -8.717797887 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + j = -8.717797887 + 7 Combine like terms: -7 + 7 = 0 0 + j = -8.717797887 + 7 j = -8.717797887 + 7 Combine like terms: -8.717797887 + 7 = -1.717797887 j = -1.717797887 Simplifying j = -1.717797887

Solution

The solution to the problem is based on the solutions from the subproblems. j = {15.717797887, -1.717797887}

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