(3x^2-4x-46)+(3x^2+7x)=

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Solution for (3x^2-4x-46)+(3x^2+7x)= equation:


Simplifying
(3x2 + -4x + -46) + (3x2 + 7x) = 0

Reorder the terms:
(-46 + -4x + 3x2) + (3x2 + 7x) = 0

Remove parenthesis around (-46 + -4x + 3x2)
-46 + -4x + 3x2 + (3x2 + 7x) = 0

Reorder the terms:
-46 + -4x + 3x2 + (7x + 3x2) = 0

Remove parenthesis around (7x + 3x2)
-46 + -4x + 3x2 + 7x + 3x2 = 0

Reorder the terms:
-46 + -4x + 7x + 3x2 + 3x2 = 0

Combine like terms: -4x + 7x = 3x
-46 + 3x + 3x2 + 3x2 = 0

Combine like terms: 3x2 + 3x2 = 6x2
-46 + 3x + 6x2 = 0

Solving
-46 + 3x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-7.666666667 + 0.5x + x2 = 0

Move the constant term to the right:

Add '7.666666667' to each side of the equation.
-7.666666667 + 0.5x + 7.666666667 + x2 = 0 + 7.666666667

Reorder the terms:
-7.666666667 + 7.666666667 + 0.5x + x2 = 0 + 7.666666667

Combine like terms: -7.666666667 + 7.666666667 = 0.000000000
0.000000000 + 0.5x + x2 = 0 + 7.666666667
0.5x + x2 = 0 + 7.666666667

Combine like terms: 0 + 7.666666667 = 7.666666667
0.5x + x2 = 7.666666667

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 7.666666667 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 7.666666667 + 0.0625

Combine like terms: 7.666666667 + 0.0625 = 7.729166667
0.0625 + 0.5x + x2 = 7.729166667

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 7.729166667

Calculate the square root of the right side: 2.780137886

Break this problem into two subproblems by setting 
(x + 0.25) equal to 2.780137886 and -2.780137886.

Subproblem 1

x + 0.25 = 2.780137886 Simplifying x + 0.25 = 2.780137886 Reorder the terms: 0.25 + x = 2.780137886 Solving 0.25 + x = 2.780137886 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 2.780137886 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 2.780137886 + -0.25 x = 2.780137886 + -0.25 Combine like terms: 2.780137886 + -0.25 = 2.530137886 x = 2.530137886 Simplifying x = 2.530137886

Subproblem 2

x + 0.25 = -2.780137886 Simplifying x + 0.25 = -2.780137886 Reorder the terms: 0.25 + x = -2.780137886 Solving 0.25 + x = -2.780137886 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -2.780137886 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -2.780137886 + -0.25 x = -2.780137886 + -0.25 Combine like terms: -2.780137886 + -0.25 = -3.030137886 x = -3.030137886 Simplifying x = -3.030137886

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.530137886, -3.030137886}

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