x^2+19x-83=0

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Solution for x^2+19x-83=0 equation:


Simplifying
x2 + 19x + -83 = 0

Reorder the terms:
-83 + 19x + x2 = 0

Solving
-83 + 19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '83' to each side of the equation.
-83 + 19x + 83 + x2 = 0 + 83

Reorder the terms:
-83 + 83 + 19x + x2 = 0 + 83

Combine like terms: -83 + 83 = 0
0 + 19x + x2 = 0 + 83
19x + x2 = 0 + 83

Combine like terms: 0 + 83 = 83
19x + x2 = 83

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 = 83 + 90.25

Reorder the terms:
90.25 + 19x + x2 = 83 + 90.25

Combine like terms: 83 + 90.25 = 173.25
90.25 + 19x + x2 = 173.25

Factor a perfect square on the left side:
(x + 9.5)(x + 9.5) = 173.25

Calculate the square root of the right side: 13.162446581

Break this problem into two subproblems by setting 
(x + 9.5) equal to 13.162446581 and -13.162446581.

Subproblem 1

x + 9.5 = 13.162446581 Simplifying x + 9.5 = 13.162446581 Reorder the terms: 9.5 + x = 13.162446581 Solving 9.5 + x = 13.162446581 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 = 13.162446581 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = 13.162446581 + -9.5 x = 13.162446581 + -9.5 Combine like terms: 13.162446581 + -9.5 = 3.662446581 x = 3.662446581 Simplifying x = 3.662446581

Subproblem 2

x + 9.5 = -13.162446581 Simplifying x + 9.5 = -13.162446581 Reorder the terms: 9.5 + x = -13.162446581 Solving 9.5 + x = -13.162446581 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 = -13.162446581 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = -13.162446581 + -9.5 x = -13.162446581 + -9.5 Combine like terms: -13.162446581 + -9.5 = -22.662446581 x = -22.662446581 Simplifying x = -22.662446581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.662446581, -22.662446581}

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