x(x+5)=207

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Solution for x(x+5)=207 equation:


Simplifying
x(x + 5) = 207

Reorder the terms:
x(5 + x) = 207
(5 * x + x * x) = 207
(5x + x2) = 207

Solving
5x + x2 = 207

Solving for variable 'x'.

Reorder the terms:
-207 + 5x + x2 = 207 + -207

Combine like terms: 207 + -207 = 0
-207 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '207' to each side of the equation.
-207 + 5x + 207 + x2 = 0 + 207

Reorder the terms:
-207 + 207 + 5x + x2 = 0 + 207

Combine like terms: -207 + 207 = 0
0 + 5x + x2 = 0 + 207
5x + x2 = 0 + 207

Combine like terms: 0 + 207 = 207
5x + x2 = 207

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 = 207 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 207 + 6.25

Combine like terms: 207 + 6.25 = 213.25
6.25 + 5x + x2 = 213.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 213.25

Calculate the square root of the right side: 14.603081867

Break this problem into two subproblems by setting 
(x + 2.5) equal to 14.603081867 and -14.603081867.

Subproblem 1

x + 2.5 = 14.603081867 Simplifying x + 2.5 = 14.603081867 Reorder the terms: 2.5 + x = 14.603081867 Solving 2.5 + x = 14.603081867 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 = 14.603081867 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 14.603081867 + -2.5 x = 14.603081867 + -2.5 Combine like terms: 14.603081867 + -2.5 = 12.103081867 x = 12.103081867 Simplifying x = 12.103081867

Subproblem 2

x + 2.5 = -14.603081867 Simplifying x + 2.5 = -14.603081867 Reorder the terms: 2.5 + x = -14.603081867 Solving 2.5 + x = -14.603081867 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 = -14.603081867 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -14.603081867 + -2.5 x = -14.603081867 + -2.5 Combine like terms: -14.603081867 + -2.5 = -17.103081867 x = -17.103081867 Simplifying x = -17.103081867

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.103081867, -17.103081867}

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