3x^2+9x+3x^2=14+x-1

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Solution for 3x^2+9x+3x^2=14+x-1 equation:


Simplifying
3x2 + 9x + 3x2 = 14 + x + -1

Reorder the terms:
9x + 3x2 + 3x2 = 14 + x + -1

Combine like terms: 3x2 + 3x2 = 6x2
9x + 6x2 = 14 + x + -1

Reorder the terms:
9x + 6x2 = 14 + -1 + x

Combine like terms: 14 + -1 = 13
9x + 6x2 = 13 + x

Solving
9x + 6x2 = 13 + x

Solving for variable 'x'.

Reorder the terms:
-13 + 9x + -1x + 6x2 = 13 + x + -13 + -1x

Combine like terms: 9x + -1x = 8x
-13 + 8x + 6x2 = 13 + x + -13 + -1x

Reorder the terms:
-13 + 8x + 6x2 = 13 + -13 + x + -1x

Combine like terms: 13 + -13 = 0
-13 + 8x + 6x2 = 0 + x + -1x
-13 + 8x + 6x2 = x + -1x

Combine like terms: x + -1x = 0
-13 + 8x + 6x2 = 0

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

Divide each side by '6'.
-2.166666667 + 1.333333333x + x2 = 0

Move the constant term to the right:

Add '2.166666667' to each side of the equation.
-2.166666667 + 1.333333333x + 2.166666667 + x2 = 0 + 2.166666667

Reorder the terms:
-2.166666667 + 2.166666667 + 1.333333333x + x2 = 0 + 2.166666667

Combine like terms: -2.166666667 + 2.166666667 = 0.000000000
0.000000000 + 1.333333333x + x2 = 0 + 2.166666667
1.333333333x + x2 = 0 + 2.166666667

Combine like terms: 0 + 2.166666667 = 2.166666667
1.333333333x + x2 = 2.166666667

The x term is 1.333333333x.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333x + 0.4444444442 + x2 = 2.166666667 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333x + x2 = 2.166666667 + 0.4444444442

Combine like terms: 2.166666667 + 0.4444444442 = 2.6111111112
0.4444444442 + 1.333333333x + x2 = 2.6111111112

Factor a perfect square on the left side:
(x + 0.6666666665)(x + 0.6666666665) = 2.6111111112

Calculate the square root of the right side: 1.615893286

Break this problem into two subproblems by setting 
(x + 0.6666666665) equal to 1.615893286 and -1.615893286.

Subproblem 1

x + 0.6666666665 = 1.615893286 Simplifying x + 0.6666666665 = 1.615893286 Reorder the terms: 0.6666666665 + x = 1.615893286 Solving 0.6666666665 + x = 1.615893286 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 1.615893286 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 1.615893286 + -0.6666666665 x = 1.615893286 + -0.6666666665 Combine like terms: 1.615893286 + -0.6666666665 = 0.9492266195 x = 0.9492266195 Simplifying x = 0.9492266195

Subproblem 2

x + 0.6666666665 = -1.615893286 Simplifying x + 0.6666666665 = -1.615893286 Reorder the terms: 0.6666666665 + x = -1.615893286 Solving 0.6666666665 + x = -1.615893286 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -1.615893286 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -1.615893286 + -0.6666666665 x = -1.615893286 + -0.6666666665 Combine like terms: -1.615893286 + -0.6666666665 = -2.2825599525 x = -2.2825599525 Simplifying x = -2.2825599525

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9492266195, -2.2825599525}

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