3x^2-6x-47=0

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Solution for 3x^2-6x-47=0 equation:


Simplifying
3x2 + -6x + -47 = 0

Reorder the terms:
-47 + -6x + 3x2 = 0

Solving
-47 + -6x + 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'.
-15.66666667 + -2x + x2 = 0

Move the constant term to the right:

Add '15.66666667' to each side of the equation.
-15.66666667 + -2x + 15.66666667 + x2 = 0 + 15.66666667

Reorder the terms:
-15.66666667 + 15.66666667 + -2x + x2 = 0 + 15.66666667

Combine like terms: -15.66666667 + 15.66666667 = 0.00000000
0.00000000 + -2x + x2 = 0 + 15.66666667
-2x + x2 = 0 + 15.66666667

Combine like terms: 0 + 15.66666667 = 15.66666667
-2x + x2 = 15.66666667

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 15.66666667 + 1

Reorder the terms:
1 + -2x + x2 = 15.66666667 + 1

Combine like terms: 15.66666667 + 1 = 16.66666667
1 + -2x + x2 = 16.66666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 16.66666667

Calculate the square root of the right side: 4.082482905

Break this problem into two subproblems by setting 
(x + -1) equal to 4.082482905 and -4.082482905.

Subproblem 1

x + -1 = 4.082482905 Simplifying x + -1 = 4.082482905 Reorder the terms: -1 + x = 4.082482905 Solving -1 + x = 4.082482905 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 4.082482905 + 1 Combine like terms: -1 + 1 = 0 0 + x = 4.082482905 + 1 x = 4.082482905 + 1 Combine like terms: 4.082482905 + 1 = 5.082482905 x = 5.082482905 Simplifying x = 5.082482905

Subproblem 2

x + -1 = -4.082482905 Simplifying x + -1 = -4.082482905 Reorder the terms: -1 + x = -4.082482905 Solving -1 + x = -4.082482905 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -4.082482905 + 1 Combine like terms: -1 + 1 = 0 0 + x = -4.082482905 + 1 x = -4.082482905 + 1 Combine like terms: -4.082482905 + 1 = -3.082482905 x = -3.082482905 Simplifying x = -3.082482905

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.082482905, -3.082482905}

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