x^2-23x=09

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Solution for x^2-23x=09 equation:


Simplifying
x2 + -23x = 9

Reorder the terms:
-23x + x2 = 9

Solving
-23x + x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + -23x + x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + -23x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -23x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -23x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -23x + x2 = 0 + 9
-23x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-23x + x2 = 9

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 = 9 + 132.25

Reorder the terms:
132.25 + -23x + x2 = 9 + 132.25

Combine like terms: 9 + 132.25 = 141.25
132.25 + -23x + x2 = 141.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 141.25

Calculate the square root of the right side: 11.884864324

Break this problem into two subproblems by setting 
(x + -11.5) equal to 11.884864324 and -11.884864324.

Subproblem 1

x + -11.5 = 11.884864324 Simplifying x + -11.5 = 11.884864324 Reorder the terms: -11.5 + x = 11.884864324 Solving -11.5 + x = 11.884864324 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 = 11.884864324 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 11.884864324 + 11.5 x = 11.884864324 + 11.5 Combine like terms: 11.884864324 + 11.5 = 23.384864324 x = 23.384864324 Simplifying x = 23.384864324

Subproblem 2

x + -11.5 = -11.884864324 Simplifying x + -11.5 = -11.884864324 Reorder the terms: -11.5 + x = -11.884864324 Solving -11.5 + x = -11.884864324 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 = -11.884864324 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -11.884864324 + 11.5 x = -11.884864324 + 11.5 Combine like terms: -11.884864324 + 11.5 = -0.384864324 x = -0.384864324 Simplifying x = -0.384864324

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.384864324, -0.384864324}

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