144=2x+x^2

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Solution for 144=2x+x^2 equation:


Simplifying
144 = 2x + x2

Solving
144 = 2x + x2

Solving for variable 'x'.

Reorder the terms:
144 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
144 + -2x + -1x2 = 0 + x2 + -1x2
144 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
144 + -2x + -1x2 = 0

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

Divide each side by '-1'.
-144 + 2x + x2 = 0

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 2x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 2x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 2x + x2 = 0 + 144
2x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
2x + x2 = 144

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 144 + 1

Reorder the terms:
1 + 2x + x2 = 144 + 1

Combine like terms: 144 + 1 = 145
1 + 2x + x2 = 145

Factor a perfect square on the left side:
(x + 1)(x + 1) = 145

Calculate the square root of the right side: 12.041594579

Break this problem into two subproblems by setting 
(x + 1) equal to 12.041594579 and -12.041594579.

Subproblem 1

x + 1 = 12.041594579 Simplifying x + 1 = 12.041594579 Reorder the terms: 1 + x = 12.041594579 Solving 1 + x = 12.041594579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 12.041594579 + -1 Combine like terms: 1 + -1 = 0 0 + x = 12.041594579 + -1 x = 12.041594579 + -1 Combine like terms: 12.041594579 + -1 = 11.041594579 x = 11.041594579 Simplifying x = 11.041594579

Subproblem 2

x + 1 = -12.041594579 Simplifying x + 1 = -12.041594579 Reorder the terms: 1 + x = -12.041594579 Solving 1 + x = -12.041594579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -12.041594579 + -1 Combine like terms: 1 + -1 = 0 0 + x = -12.041594579 + -1 x = -12.041594579 + -1 Combine like terms: -12.041594579 + -1 = -13.041594579 x = -13.041594579 Simplifying x = -13.041594579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.041594579, -13.041594579}

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