(x+10)(x+12)=240

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Solution for (x+10)(x+12)=240 equation:


Simplifying
(x + 10)(x + 12) = 240

Reorder the terms:
(10 + x)(x + 12) = 240

Reorder the terms:
(10 + x)(12 + x) = 240

Multiply (10 + x) * (12 + x)
(10(12 + x) + x(12 + x)) = 240
((12 * 10 + x * 10) + x(12 + x)) = 240
((120 + 10x) + x(12 + x)) = 240
(120 + 10x + (12 * x + x * x)) = 240
(120 + 10x + (12x + x2)) = 240

Combine like terms: 10x + 12x = 22x
(120 + 22x + x2) = 240

Solving
120 + 22x + x2 = 240

Solving for variable 'x'.

Reorder the terms:
120 + -240 + 22x + x2 = 240 + -240

Combine like terms: 120 + -240 = -120
-120 + 22x + x2 = 240 + -240

Combine like terms: 240 + -240 = 0
-120 + 22x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '120' to each side of the equation.
-120 + 22x + 120 + x2 = 0 + 120

Reorder the terms:
-120 + 120 + 22x + x2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + 22x + x2 = 0 + 120
22x + x2 = 0 + 120

Combine like terms: 0 + 120 = 120
22x + x2 = 120

The x term is 22x.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22x + 121 + x2 = 120 + 121

Reorder the terms:
121 + 22x + x2 = 120 + 121

Combine like terms: 120 + 121 = 241
121 + 22x + x2 = 241

Factor a perfect square on the left side:
(x + 11)(x + 11) = 241

Calculate the square root of the right side: 15.524174696

Break this problem into two subproblems by setting 
(x + 11) equal to 15.524174696 and -15.524174696.

Subproblem 1

x + 11 = 15.524174696 Simplifying x + 11 = 15.524174696 Reorder the terms: 11 + x = 15.524174696 Solving 11 + x = 15.524174696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 15.524174696 + -11 Combine like terms: 11 + -11 = 0 0 + x = 15.524174696 + -11 x = 15.524174696 + -11 Combine like terms: 15.524174696 + -11 = 4.524174696 x = 4.524174696 Simplifying x = 4.524174696

Subproblem 2

x + 11 = -15.524174696 Simplifying x + 11 = -15.524174696 Reorder the terms: 11 + x = -15.524174696 Solving 11 + x = -15.524174696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = -15.524174696 + -11 Combine like terms: 11 + -11 = 0 0 + x = -15.524174696 + -11 x = -15.524174696 + -11 Combine like terms: -15.524174696 + -11 = -26.524174696 x = -26.524174696 Simplifying x = -26.524174696

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.524174696, -26.524174696}

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