-12x^2-72x+299=0

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Solution for -12x^2-72x+299=0 equation:


Simplifying
-12x2 + -72x + 299 = 0

Reorder the terms:
299 + -72x + -12x2 = 0

Solving
299 + -72x + -12x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-12 the coefficient of the squared term: 

Divide each side by '-12'.
-24.91666667 + 6x + x2 = 0

Move the constant term to the right:

Add '24.91666667' to each side of the equation.
-24.91666667 + 6x + 24.91666667 + x2 = 0 + 24.91666667

Reorder the terms:
-24.91666667 + 24.91666667 + 6x + x2 = 0 + 24.91666667

Combine like terms: -24.91666667 + 24.91666667 = 0.00000000
0.00000000 + 6x + x2 = 0 + 24.91666667
6x + x2 = 0 + 24.91666667

Combine like terms: 0 + 24.91666667 = 24.91666667
6x + x2 = 24.91666667

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 = 24.91666667 + 9

Reorder the terms:
9 + 6x + x2 = 24.91666667 + 9

Combine like terms: 24.91666667 + 9 = 33.91666667
9 + 6x + x2 = 33.91666667

Factor a perfect square on the left side:
(x + 3)(x + 3) = 33.91666667

Calculate the square root of the right side: 5.823801737

Break this problem into two subproblems by setting 
(x + 3) equal to 5.823801737 and -5.823801737.

Subproblem 1

x + 3 = 5.823801737 Simplifying x + 3 = 5.823801737 Reorder the terms: 3 + x = 5.823801737 Solving 3 + x = 5.823801737 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 = 5.823801737 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.823801737 + -3 x = 5.823801737 + -3 Combine like terms: 5.823801737 + -3 = 2.823801737 x = 2.823801737 Simplifying x = 2.823801737

Subproblem 2

x + 3 = -5.823801737 Simplifying x + 3 = -5.823801737 Reorder the terms: 3 + x = -5.823801737 Solving 3 + x = -5.823801737 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 = -5.823801737 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.823801737 + -3 x = -5.823801737 + -3 Combine like terms: -5.823801737 + -3 = -8.823801737 x = -8.823801737 Simplifying x = -8.823801737

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.823801737, -8.823801737}

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