276=23x+x^2

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Solution for 276=23x+x^2 equation:


Simplifying
276 = 23x + x2

Solving
276 = 23x + x2

Solving for variable 'x'.

Reorder the terms:
276 + -23x + -1x2 = 23x + -23x + x2 + -1x2

Combine like terms: 23x + -23x = 0
276 + -23x + -1x2 = 0 + x2 + -1x2
276 + -23x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
276 + -23x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-276 + 23x + x2 = 0

Move the constant term to the right:

Add '276' to each side of the equation.
-276 + 23x + 276 + x2 = 0 + 276

Reorder the terms:
-276 + 276 + 23x + x2 = 0 + 276

Combine like terms: -276 + 276 = 0
0 + 23x + x2 = 0 + 276
23x + x2 = 0 + 276

Combine like terms: 0 + 276 = 276
23x + x2 = 276

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 = 276 + 132.25

Reorder the terms:
132.25 + 23x + x2 = 276 + 132.25

Combine like terms: 276 + 132.25 = 408.25
132.25 + 23x + x2 = 408.25

Factor a perfect square on the left side:
(x + 11.5)(x + 11.5) = 408.25

Calculate the square root of the right side: 20.205197351

Break this problem into two subproblems by setting 
(x + 11.5) equal to 20.205197351 and -20.205197351.

Subproblem 1

x + 11.5 = 20.205197351 Simplifying x + 11.5 = 20.205197351 Reorder the terms: 11.5 + x = 20.205197351 Solving 11.5 + x = 20.205197351 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 = 20.205197351 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = 20.205197351 + -11.5 x = 20.205197351 + -11.5 Combine like terms: 20.205197351 + -11.5 = 8.705197351 x = 8.705197351 Simplifying x = 8.705197351

Subproblem 2

x + 11.5 = -20.205197351 Simplifying x + 11.5 = -20.205197351 Reorder the terms: 11.5 + x = -20.205197351 Solving 11.5 + x = -20.205197351 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 = -20.205197351 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = -20.205197351 + -11.5 x = -20.205197351 + -11.5 Combine like terms: -20.205197351 + -11.5 = -31.705197351 x = -31.705197351 Simplifying x = -31.705197351

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.705197351, -31.705197351}

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