x^2-39x+72.3=0

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Solution for x^2-39x+72.3=0 equation:


Simplifying
x2 + -39x + 72.3 = 0

Reorder the terms:
72.3 + -39x + x2 = 0

Solving
72.3 + -39x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-72.3' to each side of the equation.
72.3 + -39x + -72.3 + x2 = 0 + -72.3

Reorder the terms:
72.3 + -72.3 + -39x + x2 = 0 + -72.3

Combine like terms: 72.3 + -72.3 = 0.0
0.0 + -39x + x2 = 0 + -72.3
-39x + x2 = 0 + -72.3

Combine like terms: 0 + -72.3 = -72.3
-39x + x2 = -72.3

The x term is -39x.  Take half its coefficient (-19.5).
Square it (380.25) and add it to both sides.

Add '380.25' to each side of the equation.
-39x + 380.25 + x2 = -72.3 + 380.25

Reorder the terms:
380.25 + -39x + x2 = -72.3 + 380.25

Combine like terms: -72.3 + 380.25 = 307.95
380.25 + -39x + x2 = 307.95

Factor a perfect square on the left side:
(x + -19.5)(x + -19.5) = 307.95

Calculate the square root of the right side: 17.54850421

Break this problem into two subproblems by setting 
(x + -19.5) equal to 17.54850421 and -17.54850421.

Subproblem 1

x + -19.5 = 17.54850421 Simplifying x + -19.5 = 17.54850421 Reorder the terms: -19.5 + x = 17.54850421 Solving -19.5 + x = 17.54850421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '19.5' to each side of the equation. -19.5 + 19.5 + x = 17.54850421 + 19.5 Combine like terms: -19.5 + 19.5 = 0.0 0.0 + x = 17.54850421 + 19.5 x = 17.54850421 + 19.5 Combine like terms: 17.54850421 + 19.5 = 37.04850421 x = 37.04850421 Simplifying x = 37.04850421

Subproblem 2

x + -19.5 = -17.54850421 Simplifying x + -19.5 = -17.54850421 Reorder the terms: -19.5 + x = -17.54850421 Solving -19.5 + x = -17.54850421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '19.5' to each side of the equation. -19.5 + 19.5 + x = -17.54850421 + 19.5 Combine like terms: -19.5 + 19.5 = 0.0 0.0 + x = -17.54850421 + 19.5 x = -17.54850421 + 19.5 Combine like terms: -17.54850421 + 19.5 = 1.95149579 x = 1.95149579 Simplifying x = 1.95149579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.04850421, 1.95149579}

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