x*25+x^2=135

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Solution for x*25+x^2=135 equation:


Simplifying
x * 25 + x2 = 135

Reorder the terms for easier multiplication:
25x + x2 = 135

Solving
25x + x2 = 135

Solving for variable 'x'.

Reorder the terms:
-135 + 25x + x2 = 135 + -135

Combine like terms: 135 + -135 = 0
-135 + 25x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '135' to each side of the equation.
-135 + 25x + 135 + x2 = 0 + 135

Reorder the terms:
-135 + 135 + 25x + x2 = 0 + 135

Combine like terms: -135 + 135 = 0
0 + 25x + x2 = 0 + 135
25x + x2 = 0 + 135

Combine like terms: 0 + 135 = 135
25x + x2 = 135

The x term is 25x.  Take half its coefficient (12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
25x + 156.25 + x2 = 135 + 156.25

Reorder the terms:
156.25 + 25x + x2 = 135 + 156.25

Combine like terms: 135 + 156.25 = 291.25
156.25 + 25x + x2 = 291.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 291.25

Calculate the square root of the right side: 17.066048166

Break this problem into two subproblems by setting 
(x + 12.5) equal to 17.066048166 and -17.066048166.

Subproblem 1

x + 12.5 = 17.066048166 Simplifying x + 12.5 = 17.066048166 Reorder the terms: 12.5 + x = 17.066048166 Solving 12.5 + x = 17.066048166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = 17.066048166 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 17.066048166 + -12.5 x = 17.066048166 + -12.5 Combine like terms: 17.066048166 + -12.5 = 4.566048166 x = 4.566048166 Simplifying x = 4.566048166

Subproblem 2

x + 12.5 = -17.066048166 Simplifying x + 12.5 = -17.066048166 Reorder the terms: 12.5 + x = -17.066048166 Solving 12.5 + x = -17.066048166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = -17.066048166 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -17.066048166 + -12.5 x = -17.066048166 + -12.5 Combine like terms: -17.066048166 + -12.5 = -29.566048166 x = -29.566048166 Simplifying x = -29.566048166

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.566048166, -29.566048166}

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