5x^2+5x=254

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Solution for 5x^2+5x=254 equation:


Simplifying
5x2 + 5x = 254

Reorder the terms:
5x + 5x2 = 254

Solving
5x + 5x2 = 254

Solving for variable 'x'.

Reorder the terms:
-254 + 5x + 5x2 = 254 + -254

Combine like terms: 254 + -254 = 0
-254 + 5x + 5x2 = 0

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

Divide each side by '5'.
-50.8 + x + x2 = 0

Move the constant term to the right:

Add '50.8' to each side of the equation.
-50.8 + x + 50.8 + x2 = 0 + 50.8

Reorder the terms:
-50.8 + 50.8 + x + x2 = 0 + 50.8

Combine like terms: -50.8 + 50.8 = 0.0
0.0 + x + x2 = 0 + 50.8
x + x2 = 0 + 50.8

Combine like terms: 0 + 50.8 = 50.8
x + x2 = 50.8

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 50.8 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 50.8 + 0.25

Combine like terms: 50.8 + 0.25 = 51.05
1.25 + x2 = 51.05

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 51.05

Calculate the square root of the right side: 7.144928271

Break this problem into two subproblems by setting 
(x + 0.5) equal to 7.144928271 and -7.144928271.

Subproblem 1

x + 0.5 = 7.144928271 Simplifying x + 0.5 = 7.144928271 Reorder the terms: 0.5 + x = 7.144928271 Solving 0.5 + x = 7.144928271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 7.144928271 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.144928271 + -0.5 x = 7.144928271 + -0.5 Combine like terms: 7.144928271 + -0.5 = 6.644928271 x = 6.644928271 Simplifying x = 6.644928271

Subproblem 2

x + 0.5 = -7.144928271 Simplifying x + 0.5 = -7.144928271 Reorder the terms: 0.5 + x = -7.144928271 Solving 0.5 + x = -7.144928271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -7.144928271 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.144928271 + -0.5 x = -7.144928271 + -0.5 Combine like terms: -7.144928271 + -0.5 = -7.644928271 x = -7.644928271 Simplifying x = -7.644928271

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.644928271, -7.644928271}

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