3x(x-4)=16-70x-12x

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Solution for 3x(x-4)=16-70x-12x equation:


Simplifying
3x(x + -4) = 16 + -70x + -12x

Reorder the terms:
3x(-4 + x) = 16 + -70x + -12x
(-4 * 3x + x * 3x) = 16 + -70x + -12x
(-12x + 3x2) = 16 + -70x + -12x

Combine like terms: -70x + -12x = -82x
-12x + 3x2 = 16 + -82x

Solving
-12x + 3x2 = 16 + -82x

Solving for variable 'x'.

Reorder the terms:
-16 + -12x + 82x + 3x2 = 16 + -82x + -16 + 82x

Combine like terms: -12x + 82x = 70x
-16 + 70x + 3x2 = 16 + -82x + -16 + 82x

Reorder the terms:
-16 + 70x + 3x2 = 16 + -16 + -82x + 82x

Combine like terms: 16 + -16 = 0
-16 + 70x + 3x2 = 0 + -82x + 82x
-16 + 70x + 3x2 = -82x + 82x

Combine like terms: -82x + 82x = 0
-16 + 70x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-5.333333333 + 23.33333333x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + 23.33333333x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + 23.33333333x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + 23.33333333x + x2 = 0 + 5.333333333
23.33333333x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
23.33333333x + x2 = 5.333333333

The x term is 23.33333333x.  Take half its coefficient (11.66666667).
Square it (136.1111112) and add it to both sides.

Add '136.1111112' to each side of the equation.
23.33333333x + 136.1111112 + x2 = 5.333333333 + 136.1111112

Reorder the terms:
136.1111112 + 23.33333333x + x2 = 5.333333333 + 136.1111112

Combine like terms: 5.333333333 + 136.1111112 = 141.444444533
136.1111112 + 23.33333333x + x2 = 141.444444533

Factor a perfect square on the left side:
(x + 11.66666667)(x + 11.66666667) = 141.444444533

Calculate the square root of the right side: 11.893041854

Break this problem into two subproblems by setting 
(x + 11.66666667) equal to 11.893041854 and -11.893041854.

Subproblem 1

x + 11.66666667 = 11.893041854 Simplifying x + 11.66666667 = 11.893041854 Reorder the terms: 11.66666667 + x = 11.893041854 Solving 11.66666667 + x = 11.893041854 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.66666667' to each side of the equation. 11.66666667 + -11.66666667 + x = 11.893041854 + -11.66666667 Combine like terms: 11.66666667 + -11.66666667 = 0.00000000 0.00000000 + x = 11.893041854 + -11.66666667 x = 11.893041854 + -11.66666667 Combine like terms: 11.893041854 + -11.66666667 = 0.226375184 x = 0.226375184 Simplifying x = 0.226375184

Subproblem 2

x + 11.66666667 = -11.893041854 Simplifying x + 11.66666667 = -11.893041854 Reorder the terms: 11.66666667 + x = -11.893041854 Solving 11.66666667 + x = -11.893041854 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.66666667' to each side of the equation. 11.66666667 + -11.66666667 + x = -11.893041854 + -11.66666667 Combine like terms: 11.66666667 + -11.66666667 = 0.00000000 0.00000000 + x = -11.893041854 + -11.66666667 x = -11.893041854 + -11.66666667 Combine like terms: -11.893041854 + -11.66666667 = -23.559708524 x = -23.559708524 Simplifying x = -23.559708524

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.226375184, -23.559708524}

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