-5x^2+6x+23=0

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Solution for -5x^2+6x+23=0 equation:


Simplifying
-5x2 + 6x + 23 = 0

Reorder the terms:
23 + 6x + -5x2 = 0

Solving
23 + 6x + -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'.
-4.6 + -1.2x + x2 = 0

Move the constant term to the right:

Add '4.6' to each side of the equation.
-4.6 + -1.2x + 4.6 + x2 = 0 + 4.6

Reorder the terms:
-4.6 + 4.6 + -1.2x + x2 = 0 + 4.6

Combine like terms: -4.6 + 4.6 = 0.0
0.0 + -1.2x + x2 = 0 + 4.6
-1.2x + x2 = 0 + 4.6

Combine like terms: 0 + 4.6 = 4.6
-1.2x + x2 = 4.6

The x term is -1.2x.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2x + 0.36 + x2 = 4.6 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = 4.6 + 0.36

Combine like terms: 4.6 + 0.36 = 4.96
0.36 + -1.2x + x2 = 4.96

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 4.96

Calculate the square root of the right side: 2.227105745

Break this problem into two subproblems by setting 
(x + -0.6) equal to 2.227105745 and -2.227105745.

Subproblem 1

x + -0.6 = 2.227105745 Simplifying x + -0.6 = 2.227105745 Reorder the terms: -0.6 + x = 2.227105745 Solving -0.6 + x = 2.227105745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = 2.227105745 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 2.227105745 + 0.6 x = 2.227105745 + 0.6 Combine like terms: 2.227105745 + 0.6 = 2.827105745 x = 2.827105745 Simplifying x = 2.827105745

Subproblem 2

x + -0.6 = -2.227105745 Simplifying x + -0.6 = -2.227105745 Reorder the terms: -0.6 + x = -2.227105745 Solving -0.6 + x = -2.227105745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = -2.227105745 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -2.227105745 + 0.6 x = -2.227105745 + 0.6 Combine like terms: -2.227105745 + 0.6 = -1.627105745 x = -1.627105745 Simplifying x = -1.627105745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.827105745, -1.627105745}

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