x(x+5)=2+55

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Solution for x(x+5)=2+55 equation:


Simplifying
x(x + 5) = 2 + 55

Reorder the terms:
x(5 + x) = 2 + 55
(5 * x + x * x) = 2 + 55
(5x + x2) = 2 + 55

Combine like terms: 2 + 55 = 57
5x + x2 = 57

Solving
5x + x2 = 57

Solving for variable 'x'.

Reorder the terms:
-57 + 5x + x2 = 57 + -57

Combine like terms: 57 + -57 = 0
-57 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '57' to each side of the equation.
-57 + 5x + 57 + x2 = 0 + 57

Reorder the terms:
-57 + 57 + 5x + x2 = 0 + 57

Combine like terms: -57 + 57 = 0
0 + 5x + x2 = 0 + 57
5x + x2 = 0 + 57

Combine like terms: 0 + 57 = 57
5x + x2 = 57

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 = 57 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 57 + 6.25

Combine like terms: 57 + 6.25 = 63.25
6.25 + 5x + x2 = 63.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 63.25

Calculate the square root of the right side: 7.95298686

Break this problem into two subproblems by setting 
(x + 2.5) equal to 7.95298686 and -7.95298686.

Subproblem 1

x + 2.5 = 7.95298686 Simplifying x + 2.5 = 7.95298686 Reorder the terms: 2.5 + x = 7.95298686 Solving 2.5 + x = 7.95298686 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 = 7.95298686 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 7.95298686 + -2.5 x = 7.95298686 + -2.5 Combine like terms: 7.95298686 + -2.5 = 5.45298686 x = 5.45298686 Simplifying x = 5.45298686

Subproblem 2

x + 2.5 = -7.95298686 Simplifying x + 2.5 = -7.95298686 Reorder the terms: 2.5 + x = -7.95298686 Solving 2.5 + x = -7.95298686 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 = -7.95298686 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -7.95298686 + -2.5 x = -7.95298686 + -2.5 Combine like terms: -7.95298686 + -2.5 = -10.45298686 x = -10.45298686 Simplifying x = -10.45298686

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.45298686, -10.45298686}

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