(x*x)-19x+8=0

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Solution for (x*x)-19x+8=0 equation:


Simplifying
(x * x) + -19x + 8 = 0

Multiply x * x
(x2) + -19x + 8 = 0
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 = 82.25
90.25 + -19x + x2 = 82.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 82.25

Calculate the square root of the right side: 9.069178574

Break this problem into two subproblems by setting 
(x + -9.5) equal to 9.069178574 and -9.069178574.

Subproblem 1

x + -9.5 = 9.069178574 Simplifying x + -9.5 = 9.069178574 Reorder the terms: -9.5 + x = 9.069178574 Solving -9.5 + x = 9.069178574 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 = 9.069178574 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 9.069178574 + 9.5 x = 9.069178574 + 9.5 Combine like terms: 9.069178574 + 9.5 = 18.569178574 x = 18.569178574 Simplifying x = 18.569178574

Subproblem 2

x + -9.5 = -9.069178574 Simplifying x + -9.5 = -9.069178574 Reorder the terms: -9.5 + x = -9.069178574 Solving -9.5 + x = -9.069178574 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 = -9.069178574 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -9.069178574 + 9.5 x = -9.069178574 + 9.5 Combine like terms: -9.069178574 + 9.5 = 0.430821426 x = 0.430821426 Simplifying x = 0.430821426

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.569178574, 0.430821426}

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