j^2+16j=43

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Solution for j^2+16j=43 equation:


Simplifying
j2 + 16j = 43

Reorder the terms:
16j + j2 = 43

Solving
16j + j2 = 43

Solving for variable 'j'.

Reorder the terms:
-43 + 16j + j2 = 43 + -43

Combine like terms: 43 + -43 = 0
-43 + 16j + j2 = 0

Begin completing the square.

Move the constant term to the right:

Add '43' to each side of the equation.
-43 + 16j + 43 + j2 = 0 + 43

Reorder the terms:
-43 + 43 + 16j + j2 = 0 + 43

Combine like terms: -43 + 43 = 0
0 + 16j + j2 = 0 + 43
16j + j2 = 0 + 43

Combine like terms: 0 + 43 = 43
16j + j2 = 43

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 = 43 + 64

Reorder the terms:
64 + 16j + j2 = 43 + 64

Combine like terms: 43 + 64 = 107
64 + 16j + j2 = 107

Factor a perfect square on the left side:
(j + 8)(j + 8) = 107

Calculate the square root of the right side: 10.344080433

Break this problem into two subproblems by setting 
(j + 8) equal to 10.344080433 and -10.344080433.

Subproblem 1

j + 8 = 10.344080433 Simplifying j + 8 = 10.344080433 Reorder the terms: 8 + j = 10.344080433 Solving 8 + j = 10.344080433 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 = 10.344080433 + -8 Combine like terms: 8 + -8 = 0 0 + j = 10.344080433 + -8 j = 10.344080433 + -8 Combine like terms: 10.344080433 + -8 = 2.344080433 j = 2.344080433 Simplifying j = 2.344080433

Subproblem 2

j + 8 = -10.344080433 Simplifying j + 8 = -10.344080433 Reorder the terms: 8 + j = -10.344080433 Solving 8 + j = -10.344080433 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 = -10.344080433 + -8 Combine like terms: 8 + -8 = 0 0 + j = -10.344080433 + -8 j = -10.344080433 + -8 Combine like terms: -10.344080433 + -8 = -18.344080433 j = -18.344080433 Simplifying j = -18.344080433

Solution

The solution to the problem is based on the solutions from the subproblems. j = {2.344080433, -18.344080433}

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