5x^2-20x+19=0

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Solution for 5x^2-20x+19=0 equation:


Simplifying
5x2 + -20x + 19 = 0

Reorder the terms:
19 + -20x + 5x2 = 0

Solving
19 + -20x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
3.8 + -4x + x2 = 0

Move the constant term to the right:

Add '-3.8' to each side of the equation.
3.8 + -4x + -3.8 + x2 = 0 + -3.8

Reorder the terms:
3.8 + -3.8 + -4x + x2 = 0 + -3.8

Combine like terms: 3.8 + -3.8 = 0.0
0.0 + -4x + x2 = 0 + -3.8
-4x + x2 = 0 + -3.8

Combine like terms: 0 + -3.8 = -3.8
-4x + x2 = -3.8

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -3.8 + 4

Reorder the terms:
4 + -4x + x2 = -3.8 + 4

Combine like terms: -3.8 + 4 = 0.2
4 + -4x + x2 = 0.2

Factor a perfect square on the left side:
(x + -2)(x + -2) = 0.2

Calculate the square root of the right side: 0.447213596

Break this problem into two subproblems by setting 
(x + -2) equal to 0.447213596 and -0.447213596.

Subproblem 1

x + -2 = 0.447213596 Simplifying x + -2 = 0.447213596 Reorder the terms: -2 + x = 0.447213596 Solving -2 + x = 0.447213596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 0.447213596 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0.447213596 + 2 x = 0.447213596 + 2 Combine like terms: 0.447213596 + 2 = 2.447213596 x = 2.447213596 Simplifying x = 2.447213596

Subproblem 2

x + -2 = -0.447213596 Simplifying x + -2 = -0.447213596 Reorder the terms: -2 + x = -0.447213596 Solving -2 + x = -0.447213596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -0.447213596 + 2 Combine like terms: -2 + 2 = 0 0 + x = -0.447213596 + 2 x = -0.447213596 + 2 Combine like terms: -0.447213596 + 2 = 1.552786404 x = 1.552786404 Simplifying x = 1.552786404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.447213596, 1.552786404}

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