x^2-23x+40=0

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Solution for x^2-23x+40=0 equation:


Simplifying
x2 + -23x + 40 = 0

Reorder the terms:
40 + -23x + x2 = 0

Solving
40 + -23x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -23x + -40 + x2 = 0 + -40

Reorder the terms:
40 + -40 + -23x + x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -23x + x2 = 0 + -40
-23x + x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-23x + x2 = -40

The x term is -23x.  Take half its coefficient (-11.5).
Square it (132.25) and add it to both sides.

Add '132.25' to each side of the equation.
-23x + 132.25 + x2 = -40 + 132.25

Reorder the terms:
132.25 + -23x + x2 = -40 + 132.25

Combine like terms: -40 + 132.25 = 92.25
132.25 + -23x + x2 = 92.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 92.25

Calculate the square root of the right side: 9.604686356

Break this problem into two subproblems by setting 
(x + -11.5) equal to 9.604686356 and -9.604686356.

Subproblem 1

x + -11.5 = 9.604686356 Simplifying x + -11.5 = 9.604686356 Reorder the terms: -11.5 + x = 9.604686356 Solving -11.5 + x = 9.604686356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + x = 9.604686356 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 9.604686356 + 11.5 x = 9.604686356 + 11.5 Combine like terms: 9.604686356 + 11.5 = 21.104686356 x = 21.104686356 Simplifying x = 21.104686356

Subproblem 2

x + -11.5 = -9.604686356 Simplifying x + -11.5 = -9.604686356 Reorder the terms: -11.5 + x = -9.604686356 Solving -11.5 + x = -9.604686356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + x = -9.604686356 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -9.604686356 + 11.5 x = -9.604686356 + 11.5 Combine like terms: -9.604686356 + 11.5 = 1.895313644 x = 1.895313644 Simplifying x = 1.895313644

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.104686356, 1.895313644}

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