3x^2+24x=-16

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


Simplifying
3x2 + 24x = -16

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

Solving
24x + 3x2 = -16

Solving for variable 'x'.

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

Combine like terms: -16 + 16 = 0
16 + 24x + 3x2 = 0

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 = 10.666666667
16 + 8x + x2 = 10.666666667

Factor a perfect square on the left side:
(x + 4)(x + 4) = 10.666666667

Calculate the square root of the right side: 3.265986324

Break this problem into two subproblems by setting 
(x + 4) equal to 3.265986324 and -3.265986324.

Subproblem 1

x + 4 = 3.265986324 Simplifying x + 4 = 3.265986324 Reorder the terms: 4 + x = 3.265986324 Solving 4 + x = 3.265986324 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 = 3.265986324 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3.265986324 + -4 x = 3.265986324 + -4 Combine like terms: 3.265986324 + -4 = -0.734013676 x = -0.734013676 Simplifying x = -0.734013676

Subproblem 2

x + 4 = -3.265986324 Simplifying x + 4 = -3.265986324 Reorder the terms: 4 + x = -3.265986324 Solving 4 + x = -3.265986324 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 = -3.265986324 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3.265986324 + -4 x = -3.265986324 + -4 Combine like terms: -3.265986324 + -4 = -7.265986324 x = -7.265986324 Simplifying x = -7.265986324

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.734013676, -7.265986324}

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