5x^2-23x+8=0

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Solution for 5x^2-23x+8=0 equation:


Simplifying
5x2 + -23x + 8 = 0

Reorder the terms:
8 + -23x + 5x2 = 0

Solving
8 + -23x + 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'.
1.6 + -4.6x + x2 = 0

Move the constant term to the right:

Add '-1.6' to each side of the equation.
1.6 + -4.6x + -1.6 + x2 = 0 + -1.6

Reorder the terms:
1.6 + -1.6 + -4.6x + x2 = 0 + -1.6

Combine like terms: 1.6 + -1.6 = 0.0
0.0 + -4.6x + x2 = 0 + -1.6
-4.6x + x2 = 0 + -1.6

Combine like terms: 0 + -1.6 = -1.6
-4.6x + x2 = -1.6

The x term is -4.6x.  Take half its coefficient (-2.3).
Square it (5.29) and add it to both sides.

Add '5.29' to each side of the equation.
-4.6x + 5.29 + x2 = -1.6 + 5.29

Reorder the terms:
5.29 + -4.6x + x2 = -1.6 + 5.29

Combine like terms: -1.6 + 5.29 = 3.69
5.29 + -4.6x + x2 = 3.69

Factor a perfect square on the left side:
(x + -2.3)(x + -2.3) = 3.69

Calculate the square root of the right side: 1.920937271

Break this problem into two subproblems by setting 
(x + -2.3) equal to 1.920937271 and -1.920937271.

Subproblem 1

x + -2.3 = 1.920937271 Simplifying x + -2.3 = 1.920937271 Reorder the terms: -2.3 + x = 1.920937271 Solving -2.3 + x = 1.920937271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + x = 1.920937271 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + x = 1.920937271 + 2.3 x = 1.920937271 + 2.3 Combine like terms: 1.920937271 + 2.3 = 4.220937271 x = 4.220937271 Simplifying x = 4.220937271

Subproblem 2

x + -2.3 = -1.920937271 Simplifying x + -2.3 = -1.920937271 Reorder the terms: -2.3 + x = -1.920937271 Solving -2.3 + x = -1.920937271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + x = -1.920937271 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + x = -1.920937271 + 2.3 x = -1.920937271 + 2.3 Combine like terms: -1.920937271 + 2.3 = 0.379062729 x = 0.379062729 Simplifying x = 0.379062729

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.220937271, 0.379062729}

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