j^2+16j=19

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Solution for j^2+16j=19 equation:


Simplifying
j2 + 16j = 19

Reorder the terms:
16j + j2 = 19

Solving
16j + j2 = 19

Solving for variable 'j'.

Reorder the terms:
-19 + 16j + j2 = 19 + -19

Combine like terms: 19 + -19 = 0
-19 + 16j + j2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + 16j + 19 + j2 = 0 + 19

Reorder the terms:
-19 + 19 + 16j + j2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 16j + j2 = 0 + 19
16j + j2 = 0 + 19

Combine like terms: 0 + 19 = 19
16j + j2 = 19

The j term is 16j.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16j + 64 + j2 = 19 + 64

Reorder the terms:
64 + 16j + j2 = 19 + 64

Combine like terms: 19 + 64 = 83
64 + 16j + j2 = 83

Factor a perfect square on the left side:
(j + 8)(j + 8) = 83

Calculate the square root of the right side: 9.110433579

Break this problem into two subproblems by setting 
(j + 8) equal to 9.110433579 and -9.110433579.

Subproblem 1

j + 8 = 9.110433579 Simplifying j + 8 = 9.110433579 Reorder the terms: 8 + j = 9.110433579 Solving 8 + j = 9.110433579 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + j = 9.110433579 + -8 Combine like terms: 8 + -8 = 0 0 + j = 9.110433579 + -8 j = 9.110433579 + -8 Combine like terms: 9.110433579 + -8 = 1.110433579 j = 1.110433579 Simplifying j = 1.110433579

Subproblem 2

j + 8 = -9.110433579 Simplifying j + 8 = -9.110433579 Reorder the terms: 8 + j = -9.110433579 Solving 8 + j = -9.110433579 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + j = -9.110433579 + -8 Combine like terms: 8 + -8 = 0 0 + j = -9.110433579 + -8 j = -9.110433579 + -8 Combine like terms: -9.110433579 + -8 = -17.110433579 j = -17.110433579 Simplifying j = -17.110433579

Solution

The solution to the problem is based on the solutions from the subproblems. j = {1.110433579, -17.110433579}

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