x(25+x)+(37-x)=126

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Solution for x(25+x)+(37-x)=126 equation:


Simplifying
x(25 + x) + (37 + -1x) = 126
(25 * x + x * x) + (37 + -1x) = 126
(25x + x2) + (37 + -1x) = 126

Remove parenthesis around (37 + -1x)
25x + x2 + 37 + -1x = 126

Reorder the terms:
37 + 25x + -1x + x2 = 126

Combine like terms: 25x + -1x = 24x
37 + 24x + x2 = 126

Solving
37 + 24x + x2 = 126

Solving for variable 'x'.

Reorder the terms:
37 + -126 + 24x + x2 = 126 + -126

Combine like terms: 37 + -126 = -89
-89 + 24x + x2 = 126 + -126

Combine like terms: 126 + -126 = 0
-89 + 24x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '89' to each side of the equation.
-89 + 24x + 89 + x2 = 0 + 89

Reorder the terms:
-89 + 89 + 24x + x2 = 0 + 89

Combine like terms: -89 + 89 = 0
0 + 24x + x2 = 0 + 89
24x + x2 = 0 + 89

Combine like terms: 0 + 89 = 89
24x + x2 = 89

The x term is 24x.  Take half its coefficient (12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
24x + 144 + x2 = 89 + 144

Reorder the terms:
144 + 24x + x2 = 89 + 144

Combine like terms: 89 + 144 = 233
144 + 24x + x2 = 233

Factor a perfect square on the left side:
(x + 12)(x + 12) = 233

Calculate the square root of the right side: 15.264337522

Break this problem into two subproblems by setting 
(x + 12) equal to 15.264337522 and -15.264337522.

Subproblem 1

x + 12 = 15.264337522 Simplifying x + 12 = 15.264337522 Reorder the terms: 12 + x = 15.264337522 Solving 12 + x = 15.264337522 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = 15.264337522 + -12 Combine like terms: 12 + -12 = 0 0 + x = 15.264337522 + -12 x = 15.264337522 + -12 Combine like terms: 15.264337522 + -12 = 3.264337522 x = 3.264337522 Simplifying x = 3.264337522

Subproblem 2

x + 12 = -15.264337522 Simplifying x + 12 = -15.264337522 Reorder the terms: 12 + x = -15.264337522 Solving 12 + x = -15.264337522 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = -15.264337522 + -12 Combine like terms: 12 + -12 = 0 0 + x = -15.264337522 + -12 x = -15.264337522 + -12 Combine like terms: -15.264337522 + -12 = -27.264337522 x = -27.264337522 Simplifying x = -27.264337522

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.264337522, -27.264337522}

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