2x^2-17x+19=0

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Solution for 2x^2-17x+19=0 equation:


Simplifying
2x2 + -17x + 19 = 0

Reorder the terms:
19 + -17x + 2x2 = 0

Solving
19 + -17x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
9.5 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-9.5' to each side of the equation.
9.5 + -8.5x + -9.5 + x2 = 0 + -9.5

Reorder the terms:
9.5 + -9.5 + -8.5x + x2 = 0 + -9.5

Combine like terms: 9.5 + -9.5 = 0.0
0.0 + -8.5x + x2 = 0 + -9.5
-8.5x + x2 = 0 + -9.5

Combine like terms: 0 + -9.5 = -9.5
-8.5x + x2 = -9.5

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -9.5 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -9.5 + 18.0625

Combine like terms: -9.5 + 18.0625 = 8.5625
18.0625 + -8.5x + x2 = 8.5625

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 8.5625

Calculate the square root of the right side: 2.926174978

Break this problem into two subproblems by setting 
(x + -4.25) equal to 2.926174978 and -2.926174978.

Subproblem 1

x + -4.25 = 2.926174978 Simplifying x + -4.25 = 2.926174978 Reorder the terms: -4.25 + x = 2.926174978 Solving -4.25 + x = 2.926174978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 2.926174978 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 2.926174978 + 4.25 x = 2.926174978 + 4.25 Combine like terms: 2.926174978 + 4.25 = 7.176174978 x = 7.176174978 Simplifying x = 7.176174978

Subproblem 2

x + -4.25 = -2.926174978 Simplifying x + -4.25 = -2.926174978 Reorder the terms: -4.25 + x = -2.926174978 Solving -4.25 + x = -2.926174978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -2.926174978 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -2.926174978 + 4.25 x = -2.926174978 + 4.25 Combine like terms: -2.926174978 + 4.25 = 1.323825022 x = 1.323825022 Simplifying x = 1.323825022

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.176174978, 1.323825022}

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