3x^2-24x-47=0

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Solution for 3x^2-24x-47=0 equation:


Simplifying
3x2 + -24x + -47 = 0

Reorder the terms:
-47 + -24x + 3x2 = 0

Solving
-47 + -24x + 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 + -8x + x2 = 0

Move the constant term to the right:

Add '15.66666667' to each side of the equation.
-15.66666667 + -8x + 15.66666667 + x2 = 0 + 15.66666667

Reorder the terms:
-15.66666667 + 15.66666667 + -8x + x2 = 0 + 15.66666667

Combine like terms: -15.66666667 + 15.66666667 = 0.00000000
0.00000000 + -8x + x2 = 0 + 15.66666667
-8x + x2 = 0 + 15.66666667

Combine like terms: 0 + 15.66666667 = 15.66666667
-8x + x2 = 15.66666667

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 = 15.66666667 + 16

Reorder the terms:
16 + -8x + x2 = 15.66666667 + 16

Combine like terms: 15.66666667 + 16 = 31.66666667
16 + -8x + x2 = 31.66666667

Factor a perfect square on the left side:
(x + -4)(x + -4) = 31.66666667

Calculate the square root of the right side: 5.627314339

Break this problem into two subproblems by setting 
(x + -4) equal to 5.627314339 and -5.627314339.

Subproblem 1

x + -4 = 5.627314339 Simplifying x + -4 = 5.627314339 Reorder the terms: -4 + x = 5.627314339 Solving -4 + x = 5.627314339 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 = 5.627314339 + 4 Combine like terms: -4 + 4 = 0 0 + x = 5.627314339 + 4 x = 5.627314339 + 4 Combine like terms: 5.627314339 + 4 = 9.627314339 x = 9.627314339 Simplifying x = 9.627314339

Subproblem 2

x + -4 = -5.627314339 Simplifying x + -4 = -5.627314339 Reorder the terms: -4 + x = -5.627314339 Solving -4 + x = -5.627314339 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 = -5.627314339 + 4 Combine like terms: -4 + 4 = 0 0 + x = -5.627314339 + 4 x = -5.627314339 + 4 Combine like terms: -5.627314339 + 4 = -1.627314339 x = -1.627314339 Simplifying x = -1.627314339

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.627314339, -1.627314339}

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