x^2-23x=30

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Solution for x^2-23x=30 equation:


Simplifying
x2 + -23x = 30

Reorder the terms:
-23x + x2 = 30

Solving
-23x + x2 = 30

Solving for variable 'x'.

Reorder the terms:
-30 + -23x + x2 = 30 + -30

Combine like terms: 30 + -30 = 0
-30 + -23x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -23x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + -23x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -23x + x2 = 0 + 30
-23x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
-23x + x2 = 30

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 = 30 + 132.25

Reorder the terms:
132.25 + -23x + x2 = 30 + 132.25

Combine like terms: 30 + 132.25 = 162.25
132.25 + -23x + x2 = 162.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 162.25

Calculate the square root of the right side: 12.737739203

Break this problem into two subproblems by setting 
(x + -11.5) equal to 12.737739203 and -12.737739203.

Subproblem 1

x + -11.5 = 12.737739203 Simplifying x + -11.5 = 12.737739203 Reorder the terms: -11.5 + x = 12.737739203 Solving -11.5 + x = 12.737739203 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 = 12.737739203 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 12.737739203 + 11.5 x = 12.737739203 + 11.5 Combine like terms: 12.737739203 + 11.5 = 24.237739203 x = 24.237739203 Simplifying x = 24.237739203

Subproblem 2

x + -11.5 = -12.737739203 Simplifying x + -11.5 = -12.737739203 Reorder the terms: -11.5 + x = -12.737739203 Solving -11.5 + x = -12.737739203 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 = -12.737739203 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -12.737739203 + 11.5 x = -12.737739203 + 11.5 Combine like terms: -12.737739203 + 11.5 = -1.237739203 x = -1.237739203 Simplifying x = -1.237739203

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.237739203, -1.237739203}

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