j*j+j=50

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Solution for j*j+j=50 equation:


Simplifying
j * j + j = 50

Multiply j * j
j2 + j = 50

Reorder the terms:
j + j2 = 50

Solving
j + j2 = 50

Solving for variable 'j'.

Reorder the terms:
-50 + j + j2 = 50 + -50

Combine like terms: 50 + -50 = 0
-50 + j + j2 = 0

Begin completing the square.

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + j + 50 + j2 = 0 + 50

Reorder the terms:
-50 + 50 + j + j2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + j + j2 = 0 + 50
j + j2 = 0 + 50

Combine like terms: 0 + 50 = 50
j + j2 = 50

The j term is j.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
j + 0.25 + j2 = 50 + 0.25

Reorder the terms:
0.25 + j + j2 = 50 + 0.25

Combine like terms: 50 + 0.25 = 50.25
0.25 + j + j2 = 50.25

Factor a perfect square on the left side:
(j + 0.5)(j + 0.5) = 50.25

Calculate the square root of the right side: 7.088723439

Break this problem into two subproblems by setting 
(j + 0.5) equal to 7.088723439 and -7.088723439.

Subproblem 1

j + 0.5 = 7.088723439 Simplifying j + 0.5 = 7.088723439 Reorder the terms: 0.5 + j = 7.088723439 Solving 0.5 + j = 7.088723439 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + j = 7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + j = 7.088723439 + -0.5 j = 7.088723439 + -0.5 Combine like terms: 7.088723439 + -0.5 = 6.588723439 j = 6.588723439 Simplifying j = 6.588723439

Subproblem 2

j + 0.5 = -7.088723439 Simplifying j + 0.5 = -7.088723439 Reorder the terms: 0.5 + j = -7.088723439 Solving 0.5 + j = -7.088723439 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + j = -7.088723439 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + j = -7.088723439 + -0.5 j = -7.088723439 + -0.5 Combine like terms: -7.088723439 + -0.5 = -7.588723439 j = -7.588723439 Simplifying j = -7.588723439

Solution

The solution to the problem is based on the solutions from the subproblems. j = {6.588723439, -7.588723439}

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