25x+x^2=169

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Solution for 25x+x^2=169 equation:


Simplifying
25x + x2 = 169

Solving
25x + x2 = 169

Solving for variable 'x'.

Reorder the terms:
-169 + 25x + x2 = 169 + -169

Combine like terms: 169 + -169 = 0
-169 + 25x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '169' to each side of the equation.
-169 + 25x + 169 + x2 = 0 + 169

Reorder the terms:
-169 + 169 + 25x + x2 = 0 + 169

Combine like terms: -169 + 169 = 0
0 + 25x + x2 = 0 + 169
25x + x2 = 0 + 169

Combine like terms: 0 + 169 = 169
25x + x2 = 169

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 = 169 + 156.25

Reorder the terms:
156.25 + 25x + x2 = 169 + 156.25

Combine like terms: 169 + 156.25 = 325.25
156.25 + 25x + x2 = 325.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 325.25

Calculate the square root of the right side: 18.034688797

Break this problem into two subproblems by setting 
(x + 12.5) equal to 18.034688797 and -18.034688797.

Subproblem 1

x + 12.5 = 18.034688797 Simplifying x + 12.5 = 18.034688797 Reorder the terms: 12.5 + x = 18.034688797 Solving 12.5 + x = 18.034688797 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 = 18.034688797 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 18.034688797 + -12.5 x = 18.034688797 + -12.5 Combine like terms: 18.034688797 + -12.5 = 5.534688797 x = 5.534688797 Simplifying x = 5.534688797

Subproblem 2

x + 12.5 = -18.034688797 Simplifying x + 12.5 = -18.034688797 Reorder the terms: 12.5 + x = -18.034688797 Solving 12.5 + x = -18.034688797 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 = -18.034688797 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -18.034688797 + -12.5 x = -18.034688797 + -12.5 Combine like terms: -18.034688797 + -12.5 = -30.534688797 x = -30.534688797 Simplifying x = -30.534688797

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.534688797, -30.534688797}

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