3x^2-24x-16=0

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Solution for 3x^2-24x-16=0 equation:


Simplifying
3x2 + -24x + -16 = 0

Reorder the terms:
-16 + -24x + 3x2 = 0

Solving
-16 + -24x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-5.333333333 + -8x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + -8x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + -8x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + -8x + x2 = 0 + 5.333333333
-8x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
-8x + x2 = 5.333333333

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 5.333333333 + 16

Reorder the terms:
16 + -8x + x2 = 5.333333333 + 16

Combine like terms: 5.333333333 + 16 = 21.333333333
16 + -8x + x2 = 21.333333333

Factor a perfect square on the left side:
(x + -4)(x + -4) = 21.333333333

Calculate the square root of the right side: 4.618802153

Break this problem into two subproblems by setting 
(x + -4) equal to 4.618802153 and -4.618802153.

Subproblem 1

x + -4 = 4.618802153 Simplifying x + -4 = 4.618802153 Reorder the terms: -4 + x = 4.618802153 Solving -4 + x = 4.618802153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 4.618802153 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.618802153 + 4 x = 4.618802153 + 4 Combine like terms: 4.618802153 + 4 = 8.618802153 x = 8.618802153 Simplifying x = 8.618802153

Subproblem 2

x + -4 = -4.618802153 Simplifying x + -4 = -4.618802153 Reorder the terms: -4 + x = -4.618802153 Solving -4 + x = -4.618802153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -4.618802153 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.618802153 + 4 x = -4.618802153 + 4 Combine like terms: -4.618802153 + 4 = -0.618802153 x = -0.618802153 Simplifying x = -0.618802153

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.618802153, -0.618802153}

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