8=19x-2x^2

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


Simplifying
8 = 19x + -2x2

Solving
8 = 19x + -2x2

Solving for variable 'x'.

Reorder the terms:
8 + -19x + 2x2 = 19x + -19x + -2x2 + 2x2

Combine like terms: 19x + -19x = 0
8 + -19x + 2x2 = 0 + -2x2 + 2x2
8 + -19x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
8 + -19x + 2x2 = 0

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

Divide each side by '2'.
4 + -9.5x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -9.5x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -9.5x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -9.5x + x2 = 0 + -4
-9.5x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-9.5x + x2 = -4

The x term is -9.5x.  Take half its coefficient (-4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
-9.5x + 22.5625 + x2 = -4 + 22.5625

Reorder the terms:
22.5625 + -9.5x + x2 = -4 + 22.5625

Combine like terms: -4 + 22.5625 = 18.5625
22.5625 + -9.5x + x2 = 18.5625

Factor a perfect square on the left side:
(x + -4.75)(x + -4.75) = 18.5625

Calculate the square root of the right side: 4.308421985

Break this problem into two subproblems by setting 
(x + -4.75) equal to 4.308421985 and -4.308421985.

Subproblem 1

x + -4.75 = 4.308421985 Simplifying x + -4.75 = 4.308421985 Reorder the terms: -4.75 + x = 4.308421985 Solving -4.75 + x = 4.308421985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = 4.308421985 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = 4.308421985 + 4.75 x = 4.308421985 + 4.75 Combine like terms: 4.308421985 + 4.75 = 9.058421985 x = 9.058421985 Simplifying x = 9.058421985

Subproblem 2

x + -4.75 = -4.308421985 Simplifying x + -4.75 = -4.308421985 Reorder the terms: -4.75 + x = -4.308421985 Solving -4.75 + x = -4.308421985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = -4.308421985 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = -4.308421985 + 4.75 x = -4.308421985 + 4.75 Combine like terms: -4.308421985 + 4.75 = 0.441578015 x = 0.441578015 Simplifying x = 0.441578015

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.058421985, 0.441578015}

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