72.11*x^2+3490*x-61683.8=0

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Solution for 72.11*x^2+3490*x-61683.8=0 equation:


Simplifying
72.11x2 + 3490x + -61683.8 = 0

Reorder the terms:
-61683.8 + 3490x + 72.11x2 = 0

Solving
-61683.8 + 3490x + 72.11x2 = 0

Solving for variable 'x'.

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

Divide each side by '72.11'.
-855.4125641 + 48.3982804x + x2 = 0

Move the constant term to the right:

Add '855.4125641' to each side of the equation.
-855.4125641 + 48.3982804x + 855.4125641 + x2 = 0 + 855.4125641

Reorder the terms:
-855.4125641 + 855.4125641 + 48.3982804x + x2 = 0 + 855.4125641

Combine like terms: -855.4125641 + 855.4125641 = 0.0000000
0.0000000 + 48.3982804x + x2 = 0 + 855.4125641
48.3982804x + x2 = 0 + 855.4125641

Combine like terms: 0 + 855.4125641 = 855.4125641
48.3982804x + x2 = 855.4125641

The x term is 48.3982804x.  Take half its coefficient (24.1991402).
Square it (585.5983864) and add it to both sides.

Add '585.5983864' to each side of the equation.
48.3982804x + 585.5983864 + x2 = 855.4125641 + 585.5983864

Reorder the terms:
585.5983864 + 48.3982804x + x2 = 855.4125641 + 585.5983864

Combine like terms: 855.4125641 + 585.5983864 = 1441.0109505
585.5983864 + 48.3982804x + x2 = 1441.0109505

Factor a perfect square on the left side:
(x + 24.1991402)(x + 24.1991402) = 1441.0109505

Calculate the square root of the right side: 37.960650027

Break this problem into two subproblems by setting 
(x + 24.1991402) equal to 37.960650027 and -37.960650027.

Subproblem 1

x + 24.1991402 = 37.960650027 Simplifying x + 24.1991402 = 37.960650027 Reorder the terms: 24.1991402 + x = 37.960650027 Solving 24.1991402 + x = 37.960650027 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-24.1991402' to each side of the equation. 24.1991402 + -24.1991402 + x = 37.960650027 + -24.1991402 Combine like terms: 24.1991402 + -24.1991402 = 0.0000000 0.0000000 + x = 37.960650027 + -24.1991402 x = 37.960650027 + -24.1991402 Combine like terms: 37.960650027 + -24.1991402 = 13.761509827 x = 13.761509827 Simplifying x = 13.761509827

Subproblem 2

x + 24.1991402 = -37.960650027 Simplifying x + 24.1991402 = -37.960650027 Reorder the terms: 24.1991402 + x = -37.960650027 Solving 24.1991402 + x = -37.960650027 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-24.1991402' to each side of the equation. 24.1991402 + -24.1991402 + x = -37.960650027 + -24.1991402 Combine like terms: 24.1991402 + -24.1991402 = 0.0000000 0.0000000 + x = -37.960650027 + -24.1991402 x = -37.960650027 + -24.1991402 Combine like terms: -37.960650027 + -24.1991402 = -62.159790227 x = -62.159790227 Simplifying x = -62.159790227

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.761509827, -62.159790227}

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