0=3x^2+16x-6

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Solution for 0=3x^2+16x-6 equation:


Simplifying
0 = 3x2 + 16x + -6

Reorder the terms:
0 = -6 + 16x + 3x2

Solving
0 = -6 + 16x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + 6 = 6
6 + -16x + -3x2 = -6 + 16x + 3x2 + 6 + -16x + -3x2

Reorder the terms:
6 + -16x + -3x2 = -6 + 6 + 16x + -16x + 3x2 + -3x2

Combine like terms: -6 + 6 = 0
6 + -16x + -3x2 = 0 + 16x + -16x + 3x2 + -3x2
6 + -16x + -3x2 = 16x + -16x + 3x2 + -3x2

Combine like terms: 16x + -16x = 0
6 + -16x + -3x2 = 0 + 3x2 + -3x2
6 + -16x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
6 + -16x + -3x2 = 0

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

Divide each side by '-3'.
-2 + 5.333333333x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 5.333333333x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + 5.333333333x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 5.333333333x + x2 = 0 + 2
5.333333333x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
5.333333333x + x2 = 2

The x term is 5.333333333x.  Take half its coefficient (2.666666667).
Square it (7.111111113) and add it to both sides.

Add '7.111111113' to each side of the equation.
5.333333333x + 7.111111113 + x2 = 2 + 7.111111113

Reorder the terms:
7.111111113 + 5.333333333x + x2 = 2 + 7.111111113

Combine like terms: 2 + 7.111111113 = 9.111111113
7.111111113 + 5.333333333x + x2 = 9.111111113

Factor a perfect square on the left side:
(x + 2.666666667)(x + 2.666666667) = 9.111111113

Calculate the square root of the right side: 3.018461713

Break this problem into two subproblems by setting 
(x + 2.666666667) equal to 3.018461713 and -3.018461713.

Subproblem 1

x + 2.666666667 = 3.018461713 Simplifying x + 2.666666667 = 3.018461713 Reorder the terms: 2.666666667 + x = 3.018461713 Solving 2.666666667 + x = 3.018461713 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + x = 3.018461713 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + x = 3.018461713 + -2.666666667 x = 3.018461713 + -2.666666667 Combine like terms: 3.018461713 + -2.666666667 = 0.351795046 x = 0.351795046 Simplifying x = 0.351795046

Subproblem 2

x + 2.666666667 = -3.018461713 Simplifying x + 2.666666667 = -3.018461713 Reorder the terms: 2.666666667 + x = -3.018461713 Solving 2.666666667 + x = -3.018461713 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + x = -3.018461713 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + x = -3.018461713 + -2.666666667 x = -3.018461713 + -2.666666667 Combine like terms: -3.018461713 + -2.666666667 = -5.68512838 x = -5.68512838 Simplifying x = -5.68512838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.351795046, -5.68512838}

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