x^2-19x+39=0

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Solution for x^2-19x+39=0 equation:


Simplifying
x2 + -19x + 39 = 0

Reorder the terms:
39 + -19x + x2 = 0

Solving
39 + -19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-39' to each side of the equation.
39 + -19x + -39 + x2 = 0 + -39

Reorder the terms:
39 + -39 + -19x + x2 = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -19x + x2 = 0 + -39
-19x + x2 = 0 + -39

Combine like terms: 0 + -39 = -39
-19x + x2 = -39

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = -39 + 90.25

Reorder the terms:
90.25 + -19x + x2 = -39 + 90.25

Combine like terms: -39 + 90.25 = 51.25
90.25 + -19x + x2 = 51.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 51.25

Calculate the square root of the right side: 7.158910532

Break this problem into two subproblems by setting 
(x + -9.5) equal to 7.158910532 and -7.158910532.

Subproblem 1

x + -9.5 = 7.158910532 Simplifying x + -9.5 = 7.158910532 Reorder the terms: -9.5 + x = 7.158910532 Solving -9.5 + x = 7.158910532 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 7.158910532 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 7.158910532 + 9.5 x = 7.158910532 + 9.5 Combine like terms: 7.158910532 + 9.5 = 16.658910532 x = 16.658910532 Simplifying x = 16.658910532

Subproblem 2

x + -9.5 = -7.158910532 Simplifying x + -9.5 = -7.158910532 Reorder the terms: -9.5 + x = -7.158910532 Solving -9.5 + x = -7.158910532 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -7.158910532 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -7.158910532 + 9.5 x = -7.158910532 + 9.5 Combine like terms: -7.158910532 + 9.5 = 2.341089468 x = 2.341089468 Simplifying x = 2.341089468

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.658910532, 2.341089468}

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