(x-5)(x+5)+12x=6x+12

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Solution for (x-5)(x+5)+12x=6x+12 equation:


Simplifying
(x + -5)(x + 5) + 12x = 6x + 12

Reorder the terms:
(-5 + x)(x + 5) + 12x = 6x + 12

Reorder the terms:
(-5 + x)(5 + x) + 12x = 6x + 12

Multiply (-5 + x) * (5 + x)
(-5(5 + x) + x(5 + x)) + 12x = 6x + 12
((5 * -5 + x * -5) + x(5 + x)) + 12x = 6x + 12
((-25 + -5x) + x(5 + x)) + 12x = 6x + 12
(-25 + -5x + (5 * x + x * x)) + 12x = 6x + 12
(-25 + -5x + (5x + x2)) + 12x = 6x + 12

Combine like terms: -5x + 5x = 0
(-25 + 0 + x2) + 12x = 6x + 12
(-25 + x2) + 12x = 6x + 12

Reorder the terms:
-25 + 12x + x2 = 6x + 12

Reorder the terms:
-25 + 12x + x2 = 12 + 6x

Solving
-25 + 12x + x2 = 12 + 6x

Solving for variable 'x'.

Reorder the terms:
-25 + -12 + 12x + -6x + x2 = 12 + 6x + -12 + -6x

Combine like terms: -25 + -12 = -37
-37 + 12x + -6x + x2 = 12 + 6x + -12 + -6x

Combine like terms: 12x + -6x = 6x
-37 + 6x + x2 = 12 + 6x + -12 + -6x

Reorder the terms:
-37 + 6x + x2 = 12 + -12 + 6x + -6x

Combine like terms: 12 + -12 = 0
-37 + 6x + x2 = 0 + 6x + -6x
-37 + 6x + x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-37 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '37' to each side of the equation.
-37 + 6x + 37 + x2 = 0 + 37

Reorder the terms:
-37 + 37 + 6x + x2 = 0 + 37

Combine like terms: -37 + 37 = 0
0 + 6x + x2 = 0 + 37
6x + x2 = 0 + 37

Combine like terms: 0 + 37 = 37
6x + x2 = 37

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 37 + 9

Reorder the terms:
9 + 6x + x2 = 37 + 9

Combine like terms: 37 + 9 = 46
9 + 6x + x2 = 46

Factor a perfect square on the left side:
(x + 3)(x + 3) = 46

Calculate the square root of the right side: 6.782329983

Break this problem into two subproblems by setting 
(x + 3) equal to 6.782329983 and -6.782329983.

Subproblem 1

x + 3 = 6.782329983 Simplifying x + 3 = 6.782329983 Reorder the terms: 3 + x = 6.782329983 Solving 3 + x = 6.782329983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 6.782329983 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.782329983 + -3 x = 6.782329983 + -3 Combine like terms: 6.782329983 + -3 = 3.782329983 x = 3.782329983 Simplifying x = 3.782329983

Subproblem 2

x + 3 = -6.782329983 Simplifying x + 3 = -6.782329983 Reorder the terms: 3 + x = -6.782329983 Solving 3 + x = -6.782329983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -6.782329983 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.782329983 + -3 x = -6.782329983 + -3 Combine like terms: -6.782329983 + -3 = -9.782329983 x = -9.782329983 Simplifying x = -9.782329983

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.782329983, -9.782329983}

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