684x+3775(x-36)x=7

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Solution for 684x+3775(x-36)x=7 equation:


Simplifying
684x + 3775(x + -36) * x = 7

Reorder the terms:
684x + 3775(-36 + x) * x = 7

Reorder the terms for easier multiplication:
684x + 3775x(-36 + x) = 7
684x + (-36 * 3775x + x * 3775x) = 7
684x + (-135900x + 3775x2) = 7

Combine like terms: 684x + -135900x = -135216x
-135216x + 3775x2 = 7

Solving
-135216x + 3775x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + -135216x + 3775x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -135216x + 3775x2 = 0

Begin completing the square.  Divide all terms by
3775 the coefficient of the squared term: 

Divide each side by '3775'.
-0.001854304636 + -35.81880795x + x2 = 0

Move the constant term to the right:

Add '0.001854304636' to each side of the equation.
-0.001854304636 + -35.81880795x + 0.001854304636 + x2 = 0 + 0.001854304636

Reorder the terms:
-0.001854304636 + 0.001854304636 + -35.81880795x + x2 = 0 + 0.001854304636

Combine like terms: -0.001854304636 + 0.001854304636 = 0.000000000000
0.000000000000 + -35.81880795x + x2 = 0 + 0.001854304636
-35.81880795x + x2 = 0 + 0.001854304636

Combine like terms: 0 + 0.001854304636 = 0.001854304636
-35.81880795x + x2 = 0.001854304636

The x term is -35.81880795x.  Take half its coefficient (-17.90940398).
Square it (320.7467509) and add it to both sides.

Add '320.7467509' to each side of the equation.
-35.81880795x + 320.7467509 + x2 = 0.001854304636 + 320.7467509

Reorder the terms:
320.7467509 + -35.81880795x + x2 = 0.001854304636 + 320.7467509

Combine like terms: 0.001854304636 + 320.7467509 = 320.748605204636
320.7467509 + -35.81880795x + x2 = 320.748605204636

Factor a perfect square on the left side:
(x + -17.90940398)(x + -17.90940398) = 320.748605204636

Calculate the square root of the right side: 17.909455748

Break this problem into two subproblems by setting 
(x + -17.90940398) equal to 17.909455748 and -17.909455748.

Subproblem 1

x + -17.90940398 = 17.909455748 Simplifying x + -17.90940398 = 17.909455748 Reorder the terms: -17.90940398 + x = 17.909455748 Solving -17.90940398 + x = 17.909455748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.90940398' to each side of the equation. -17.90940398 + 17.90940398 + x = 17.909455748 + 17.90940398 Combine like terms: -17.90940398 + 17.90940398 = 0.00000000 0.00000000 + x = 17.909455748 + 17.90940398 x = 17.909455748 + 17.90940398 Combine like terms: 17.909455748 + 17.90940398 = 35.818859728 x = 35.818859728 Simplifying x = 35.818859728

Subproblem 2

x + -17.90940398 = -17.909455748 Simplifying x + -17.90940398 = -17.909455748 Reorder the terms: -17.90940398 + x = -17.909455748 Solving -17.90940398 + x = -17.909455748 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.90940398' to each side of the equation. -17.90940398 + 17.90940398 + x = -17.909455748 + 17.90940398 Combine like terms: -17.90940398 + 17.90940398 = 0.00000000 0.00000000 + x = -17.909455748 + 17.90940398 x = -17.909455748 + 17.90940398 Combine like terms: -17.909455748 + 17.90940398 = -0.000051768 x = -0.000051768 Simplifying x = -0.000051768

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.818859728, -0.000051768}

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