(x+10)(x-6)=360

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Solution for (x+10)(x-6)=360 equation:


Simplifying
(x + 10)(x + -6) = 360

Reorder the terms:
(10 + x)(x + -6) = 360

Reorder the terms:
(10 + x)(-6 + x) = 360

Multiply (10 + x) * (-6 + x)
(10(-6 + x) + x(-6 + x)) = 360
((-6 * 10 + x * 10) + x(-6 + x)) = 360
((-60 + 10x) + x(-6 + x)) = 360
(-60 + 10x + (-6 * x + x * x)) = 360
(-60 + 10x + (-6x + x2)) = 360

Combine like terms: 10x + -6x = 4x
(-60 + 4x + x2) = 360

Solving
-60 + 4x + x2 = 360

Solving for variable 'x'.

Reorder the terms:
-60 + -360 + 4x + x2 = 360 + -360

Combine like terms: -60 + -360 = -420
-420 + 4x + x2 = 360 + -360

Combine like terms: 360 + -360 = 0
-420 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '420' to each side of the equation.
-420 + 4x + 420 + x2 = 0 + 420

Reorder the terms:
-420 + 420 + 4x + x2 = 0 + 420

Combine like terms: -420 + 420 = 0
0 + 4x + x2 = 0 + 420
4x + x2 = 0 + 420

Combine like terms: 0 + 420 = 420
4x + x2 = 420

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 420 + 4

Reorder the terms:
4 + 4x + x2 = 420 + 4

Combine like terms: 420 + 4 = 424
4 + 4x + x2 = 424

Factor a perfect square on the left side:
(x + 2)(x + 2) = 424

Calculate the square root of the right side: 20.591260282

Break this problem into two subproblems by setting 
(x + 2) equal to 20.591260282 and -20.591260282.

Subproblem 1

x + 2 = 20.591260282 Simplifying x + 2 = 20.591260282 Reorder the terms: 2 + x = 20.591260282 Solving 2 + x = 20.591260282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 20.591260282 + -2 Combine like terms: 2 + -2 = 0 0 + x = 20.591260282 + -2 x = 20.591260282 + -2 Combine like terms: 20.591260282 + -2 = 18.591260282 x = 18.591260282 Simplifying x = 18.591260282

Subproblem 2

x + 2 = -20.591260282 Simplifying x + 2 = -20.591260282 Reorder the terms: 2 + x = -20.591260282 Solving 2 + x = -20.591260282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -20.591260282 + -2 Combine like terms: 2 + -2 = 0 0 + x = -20.591260282 + -2 x = -20.591260282 + -2 Combine like terms: -20.591260282 + -2 = -22.591260282 x = -22.591260282 Simplifying x = -22.591260282

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.591260282, -22.591260282}

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