0=x^2-19x-299

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Solution for 0=x^2-19x-299 equation:


Simplifying
0 = x2 + -19x + -299

Reorder the terms:
0 = -299 + -19x + x2

Solving
0 = -299 + -19x + x2

Solving for variable 'x'.

Combine like terms: 0 + 299 = 299
299 + 19x + -1x2 = -299 + -19x + x2 + 299 + 19x + -1x2

Reorder the terms:
299 + 19x + -1x2 = -299 + 299 + -19x + 19x + x2 + -1x2

Combine like terms: -299 + 299 = 0
299 + 19x + -1x2 = 0 + -19x + 19x + x2 + -1x2
299 + 19x + -1x2 = -19x + 19x + x2 + -1x2

Combine like terms: -19x + 19x = 0
299 + 19x + -1x2 = 0 + x2 + -1x2
299 + 19x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
299 + 19x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-299 + -19x + x2 = 0

Move the constant term to the right:

Add '299' to each side of the equation.
-299 + -19x + 299 + x2 = 0 + 299

Reorder the terms:
-299 + 299 + -19x + x2 = 0 + 299

Combine like terms: -299 + 299 = 0
0 + -19x + x2 = 0 + 299
-19x + x2 = 0 + 299

Combine like terms: 0 + 299 = 299
-19x + x2 = 299

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 = 299 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 299 + 90.25

Combine like terms: 299 + 90.25 = 389.25
90.25 + -19x + x2 = 389.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 389.25

Calculate the square root of the right side: 19.729419657

Break this problem into two subproblems by setting 
(x + -9.5) equal to 19.729419657 and -19.729419657.

Subproblem 1

x + -9.5 = 19.729419657 Simplifying x + -9.5 = 19.729419657 Reorder the terms: -9.5 + x = 19.729419657 Solving -9.5 + x = 19.729419657 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 = 19.729419657 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 19.729419657 + 9.5 x = 19.729419657 + 9.5 Combine like terms: 19.729419657 + 9.5 = 29.229419657 x = 29.229419657 Simplifying x = 29.229419657

Subproblem 2

x + -9.5 = -19.729419657 Simplifying x + -9.5 = -19.729419657 Reorder the terms: -9.5 + x = -19.729419657 Solving -9.5 + x = -19.729419657 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 = -19.729419657 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -19.729419657 + 9.5 x = -19.729419657 + 9.5 Combine like terms: -19.729419657 + 9.5 = -10.229419657 x = -10.229419657 Simplifying x = -10.229419657

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.229419657, -10.229419657}

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