x^2-19x-8=0

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Solution for x^2-19x-8=0 equation:


Simplifying
x2 + -19x + -8 = 0

Reorder the terms:
-8 + -19x + x2 = 0

Solving
-8 + -19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + -19x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + -19x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -19x + x2 = 0 + 8
-19x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
-19x + x2 = 8

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 = 8 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 8 + 90.25

Combine like terms: 8 + 90.25 = 98.25
90.25 + -19x + x2 = 98.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 98.25

Calculate the square root of the right side: 9.912113801

Break this problem into two subproblems by setting 
(x + -9.5) equal to 9.912113801 and -9.912113801.

Subproblem 1

x + -9.5 = 9.912113801 Simplifying x + -9.5 = 9.912113801 Reorder the terms: -9.5 + x = 9.912113801 Solving -9.5 + x = 9.912113801 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 = 9.912113801 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 9.912113801 + 9.5 x = 9.912113801 + 9.5 Combine like terms: 9.912113801 + 9.5 = 19.412113801 x = 19.412113801 Simplifying x = 19.412113801

Subproblem 2

x + -9.5 = -9.912113801 Simplifying x + -9.5 = -9.912113801 Reorder the terms: -9.5 + x = -9.912113801 Solving -9.5 + x = -9.912113801 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 = -9.912113801 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -9.912113801 + 9.5 x = -9.912113801 + 9.5 Combine like terms: -9.912113801 + 9.5 = -0.412113801 x = -0.412113801 Simplifying x = -0.412113801

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.412113801, -0.412113801}

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