x=24x^2-12x-72

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Solution for x=24x^2-12x-72 equation:


Simplifying
x = 24x2 + -12x + -72

Reorder the terms:
x = -72 + -12x + 24x2

Solving
x = -72 + -12x + 24x2

Solving for variable 'x'.

Reorder the terms:
72 + x + 12x + -24x2 = -72 + -12x + 24x2 + 72 + 12x + -24x2

Combine like terms: x + 12x = 13x
72 + 13x + -24x2 = -72 + -12x + 24x2 + 72 + 12x + -24x2

Reorder the terms:
72 + 13x + -24x2 = -72 + 72 + -12x + 12x + 24x2 + -24x2

Combine like terms: -72 + 72 = 0
72 + 13x + -24x2 = 0 + -12x + 12x + 24x2 + -24x2
72 + 13x + -24x2 = -12x + 12x + 24x2 + -24x2

Combine like terms: -12x + 12x = 0
72 + 13x + -24x2 = 0 + 24x2 + -24x2
72 + 13x + -24x2 = 24x2 + -24x2

Combine like terms: 24x2 + -24x2 = 0
72 + 13x + -24x2 = 0

Begin completing the square.  Divide all terms by
-24 the coefficient of the squared term: 

Divide each side by '-24'.
-3 + -0.5416666667x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -0.5416666667x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -0.5416666667x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -0.5416666667x + x2 = 0 + 3
-0.5416666667x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-0.5416666667x + x2 = 3

The x term is -0.5416666667x.  Take half its coefficient (-0.2708333334).
Square it (0.07335069448) and add it to both sides.

Add '0.07335069448' to each side of the equation.
-0.5416666667x + 0.07335069448 + x2 = 3 + 0.07335069448

Reorder the terms:
0.07335069448 + -0.5416666667x + x2 = 3 + 0.07335069448

Combine like terms: 3 + 0.07335069448 = 3.07335069448
0.07335069448 + -0.5416666667x + x2 = 3.07335069448

Factor a perfect square on the left side:
(x + -0.2708333334)(x + -0.2708333334) = 3.07335069448

Calculate the square root of the right side: 1.753097457

Break this problem into two subproblems by setting 
(x + -0.2708333334) equal to 1.753097457 and -1.753097457.

Subproblem 1

x + -0.2708333334 = 1.753097457 Simplifying x + -0.2708333334 = 1.753097457 Reorder the terms: -0.2708333334 + x = 1.753097457 Solving -0.2708333334 + x = 1.753097457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2708333334' to each side of the equation. -0.2708333334 + 0.2708333334 + x = 1.753097457 + 0.2708333334 Combine like terms: -0.2708333334 + 0.2708333334 = 0.0000000000 0.0000000000 + x = 1.753097457 + 0.2708333334 x = 1.753097457 + 0.2708333334 Combine like terms: 1.753097457 + 0.2708333334 = 2.0239307904 x = 2.0239307904 Simplifying x = 2.0239307904

Subproblem 2

x + -0.2708333334 = -1.753097457 Simplifying x + -0.2708333334 = -1.753097457 Reorder the terms: -0.2708333334 + x = -1.753097457 Solving -0.2708333334 + x = -1.753097457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2708333334' to each side of the equation. -0.2708333334 + 0.2708333334 + x = -1.753097457 + 0.2708333334 Combine like terms: -0.2708333334 + 0.2708333334 = 0.0000000000 0.0000000000 + x = -1.753097457 + 0.2708333334 x = -1.753097457 + 0.2708333334 Combine like terms: -1.753097457 + 0.2708333334 = -1.4822641236 x = -1.4822641236 Simplifying x = -1.4822641236

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.0239307904, -1.4822641236}

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