x^2+5x=504

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Solution for x^2+5x=504 equation:


Simplifying
x2 + 5x = 504

Reorder the terms:
5x + x2 = 504

Solving
5x + x2 = 504

Solving for variable 'x'.

Reorder the terms:
-504 + 5x + x2 = 504 + -504

Combine like terms: 504 + -504 = 0
-504 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '504' to each side of the equation.
-504 + 5x + 504 + x2 = 0 + 504

Reorder the terms:
-504 + 504 + 5x + x2 = 0 + 504

Combine like terms: -504 + 504 = 0
0 + 5x + x2 = 0 + 504
5x + x2 = 0 + 504

Combine like terms: 0 + 504 = 504
5x + x2 = 504

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 504 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 504 + 6.25

Combine like terms: 504 + 6.25 = 510.25
6.25 + 5x + x2 = 510.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 510.25

Calculate the square root of the right side: 22.588713996

Break this problem into two subproblems by setting 
(x + 2.5) equal to 22.588713996 and -22.588713996.

Subproblem 1

x + 2.5 = 22.588713996 Simplifying x + 2.5 = 22.588713996 Reorder the terms: 2.5 + x = 22.588713996 Solving 2.5 + x = 22.588713996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 22.588713996 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 22.588713996 + -2.5 x = 22.588713996 + -2.5 Combine like terms: 22.588713996 + -2.5 = 20.088713996 x = 20.088713996 Simplifying x = 20.088713996

Subproblem 2

x + 2.5 = -22.588713996 Simplifying x + 2.5 = -22.588713996 Reorder the terms: 2.5 + x = -22.588713996 Solving 2.5 + x = -22.588713996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -22.588713996 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -22.588713996 + -2.5 x = -22.588713996 + -2.5 Combine like terms: -22.588713996 + -2.5 = -25.088713996 x = -25.088713996 Simplifying x = -25.088713996

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.088713996, -25.088713996}

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