x(x+2)=61

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Solution for x(x+2)=61 equation:


Simplifying
x(x + 2) = 61

Reorder the terms:
x(2 + x) = 61
(2 * x + x * x) = 61
(2x + x2) = 61

Solving
2x + x2 = 61

Solving for variable 'x'.

Reorder the terms:
-61 + 2x + x2 = 61 + -61

Combine like terms: 61 + -61 = 0
-61 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '61' to each side of the equation.
-61 + 2x + 61 + x2 = 0 + 61

Reorder the terms:
-61 + 61 + 2x + x2 = 0 + 61

Combine like terms: -61 + 61 = 0
0 + 2x + x2 = 0 + 61
2x + x2 = 0 + 61

Combine like terms: 0 + 61 = 61
2x + x2 = 61

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 61 + 1

Reorder the terms:
1 + 2x + x2 = 61 + 1

Combine like terms: 61 + 1 = 62
1 + 2x + x2 = 62

Factor a perfect square on the left side:
(x + 1)(x + 1) = 62

Calculate the square root of the right side: 7.874007874

Break this problem into two subproblems by setting 
(x + 1) equal to 7.874007874 and -7.874007874.

Subproblem 1

x + 1 = 7.874007874 Simplifying x + 1 = 7.874007874 Reorder the terms: 1 + x = 7.874007874 Solving 1 + x = 7.874007874 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 7.874007874 + -1 Combine like terms: 1 + -1 = 0 0 + x = 7.874007874 + -1 x = 7.874007874 + -1 Combine like terms: 7.874007874 + -1 = 6.874007874 x = 6.874007874 Simplifying x = 6.874007874

Subproblem 2

x + 1 = -7.874007874 Simplifying x + 1 = -7.874007874 Reorder the terms: 1 + x = -7.874007874 Solving 1 + x = -7.874007874 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -7.874007874 + -1 Combine like terms: 1 + -1 = 0 0 + x = -7.874007874 + -1 x = -7.874007874 + -1 Combine like terms: -7.874007874 + -1 = -8.874007874 x = -8.874007874 Simplifying x = -8.874007874

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.874007874, -8.874007874}

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