2x^2+23x-5=0

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


Simplifying
2x2 + 23x + -5 = 0

Reorder the terms:
-5 + 23x + 2x2 = 0

Solving
-5 + 23x + 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'.
-2.5 + 11.5x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + 11.5x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + 11.5x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + 11.5x + x2 = 0 + 2.5
11.5x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
11.5x + x2 = 2.5

The x term is 11.5x.  Take half its coefficient (5.75).
Square it (33.0625) and add it to both sides.

Add '33.0625' to each side of the equation.
11.5x + 33.0625 + x2 = 2.5 + 33.0625

Reorder the terms:
33.0625 + 11.5x + x2 = 2.5 + 33.0625

Combine like terms: 2.5 + 33.0625 = 35.5625
33.0625 + 11.5x + x2 = 35.5625

Factor a perfect square on the left side:
(x + 5.75)(x + 5.75) = 35.5625

Calculate the square root of the right side: 5.963430221

Break this problem into two subproblems by setting 
(x + 5.75) equal to 5.963430221 and -5.963430221.

Subproblem 1

x + 5.75 = 5.963430221 Simplifying x + 5.75 = 5.963430221 Reorder the terms: 5.75 + x = 5.963430221 Solving 5.75 + x = 5.963430221 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.75' to each side of the equation. 5.75 + -5.75 + x = 5.963430221 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = 5.963430221 + -5.75 x = 5.963430221 + -5.75 Combine like terms: 5.963430221 + -5.75 = 0.213430221 x = 0.213430221 Simplifying x = 0.213430221

Subproblem 2

x + 5.75 = -5.963430221 Simplifying x + 5.75 = -5.963430221 Reorder the terms: 5.75 + x = -5.963430221 Solving 5.75 + x = -5.963430221 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.75' to each side of the equation. 5.75 + -5.75 + x = -5.963430221 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = -5.963430221 + -5.75 x = -5.963430221 + -5.75 Combine like terms: -5.963430221 + -5.75 = -11.713430221 x = -11.713430221 Simplifying x = -11.713430221

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.213430221, -11.713430221}

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