x(x+5)=366

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Solution for x(x+5)=366 equation:


Simplifying
x(x + 5) = 366

Reorder the terms:
x(5 + x) = 366
(5 * x + x * x) = 366
(5x + x2) = 366

Solving
5x + x2 = 366

Solving for variable 'x'.

Reorder the terms:
-366 + 5x + x2 = 366 + -366

Combine like terms: 366 + -366 = 0
-366 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '366' to each side of the equation.
-366 + 5x + 366 + x2 = 0 + 366

Reorder the terms:
-366 + 366 + 5x + x2 = 0 + 366

Combine like terms: -366 + 366 = 0
0 + 5x + x2 = 0 + 366
5x + x2 = 0 + 366

Combine like terms: 0 + 366 = 366
5x + x2 = 366

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 = 366 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 366 + 6.25

Combine like terms: 366 + 6.25 = 372.25
6.25 + 5x + x2 = 372.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 372.25

Calculate the square root of the right side: 19.293781382

Break this problem into two subproblems by setting 
(x + 2.5) equal to 19.293781382 and -19.293781382.

Subproblem 1

x + 2.5 = 19.293781382 Simplifying x + 2.5 = 19.293781382 Reorder the terms: 2.5 + x = 19.293781382 Solving 2.5 + x = 19.293781382 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 = 19.293781382 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 19.293781382 + -2.5 x = 19.293781382 + -2.5 Combine like terms: 19.293781382 + -2.5 = 16.793781382 x = 16.793781382 Simplifying x = 16.793781382

Subproblem 2

x + 2.5 = -19.293781382 Simplifying x + 2.5 = -19.293781382 Reorder the terms: 2.5 + x = -19.293781382 Solving 2.5 + x = -19.293781382 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 = -19.293781382 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -19.293781382 + -2.5 x = -19.293781382 + -2.5 Combine like terms: -19.293781382 + -2.5 = -21.793781382 x = -21.793781382 Simplifying x = -21.793781382

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.793781382, -21.793781382}

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