x^2-19x+8=57

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Solution for x^2-19x+8=57 equation:


Simplifying
x2 + -19x + 8 = 57

Reorder the terms:
8 + -19x + x2 = 57

Solving
8 + -19x + x2 = 57

Solving for variable 'x'.

Reorder the terms:
8 + -57 + -19x + x2 = 57 + -57

Combine like terms: 8 + -57 = -49
-49 + -19x + x2 = 57 + -57

Combine like terms: 57 + -57 = 0
-49 + -19x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + -19x + 49 + x2 = 0 + 49

Reorder the terms:
-49 + 49 + -19x + x2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + -19x + x2 = 0 + 49
-19x + x2 = 0 + 49

Combine like terms: 0 + 49 = 49
-19x + x2 = 49

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 = 49 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 49 + 90.25

Combine like terms: 49 + 90.25 = 139.25
90.25 + -19x + x2 = 139.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 139.25

Calculate the square root of the right side: 11.800423721

Break this problem into two subproblems by setting 
(x + -9.5) equal to 11.800423721 and -11.800423721.

Subproblem 1

x + -9.5 = 11.800423721 Simplifying x + -9.5 = 11.800423721 Reorder the terms: -9.5 + x = 11.800423721 Solving -9.5 + x = 11.800423721 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 = 11.800423721 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 11.800423721 + 9.5 x = 11.800423721 + 9.5 Combine like terms: 11.800423721 + 9.5 = 21.300423721 x = 21.300423721 Simplifying x = 21.300423721

Subproblem 2

x + -9.5 = -11.800423721 Simplifying x + -9.5 = -11.800423721 Reorder the terms: -9.5 + x = -11.800423721 Solving -9.5 + x = -11.800423721 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 = -11.800423721 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -11.800423721 + 9.5 x = -11.800423721 + 9.5 Combine like terms: -11.800423721 + 9.5 = -2.300423721 x = -2.300423721 Simplifying x = -2.300423721

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.300423721, -2.300423721}

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