6x^2-47x+128=216

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Solution for 6x^2-47x+128=216 equation:


Simplifying
6x2 + -47x + 128 = 216

Reorder the terms:
128 + -47x + 6x2 = 216

Solving
128 + -47x + 6x2 = 216

Solving for variable 'x'.

Reorder the terms:
128 + -216 + -47x + 6x2 = 216 + -216

Combine like terms: 128 + -216 = -88
-88 + -47x + 6x2 = 216 + -216

Combine like terms: 216 + -216 = 0
-88 + -47x + 6x2 = 0

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

Divide each side by '6'.
-14.66666667 + -7.833333333x + x2 = 0

Move the constant term to the right:

Add '14.66666667' to each side of the equation.
-14.66666667 + -7.833333333x + 14.66666667 + x2 = 0 + 14.66666667

Reorder the terms:
-14.66666667 + 14.66666667 + -7.833333333x + x2 = 0 + 14.66666667

Combine like terms: -14.66666667 + 14.66666667 = 0.00000000
0.00000000 + -7.833333333x + x2 = 0 + 14.66666667
-7.833333333x + x2 = 0 + 14.66666667

Combine like terms: 0 + 14.66666667 = 14.66666667
-7.833333333x + x2 = 14.66666667

The x term is -7.833333333x.  Take half its coefficient (-3.916666667).
Square it (15.34027778) and add it to both sides.

Add '15.34027778' to each side of the equation.
-7.833333333x + 15.34027778 + x2 = 14.66666667 + 15.34027778

Reorder the terms:
15.34027778 + -7.833333333x + x2 = 14.66666667 + 15.34027778

Combine like terms: 14.66666667 + 15.34027778 = 30.00694445
15.34027778 + -7.833333333x + x2 = 30.00694445

Factor a perfect square on the left side:
(x + -3.916666667)(x + -3.916666667) = 30.00694445

Calculate the square root of the right side: 5.477859477

Break this problem into two subproblems by setting 
(x + -3.916666667) equal to 5.477859477 and -5.477859477.

Subproblem 1

x + -3.916666667 = 5.477859477 Simplifying x + -3.916666667 = 5.477859477 Reorder the terms: -3.916666667 + x = 5.477859477 Solving -3.916666667 + x = 5.477859477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.916666667' to each side of the equation. -3.916666667 + 3.916666667 + x = 5.477859477 + 3.916666667 Combine like terms: -3.916666667 + 3.916666667 = 0.000000000 0.000000000 + x = 5.477859477 + 3.916666667 x = 5.477859477 + 3.916666667 Combine like terms: 5.477859477 + 3.916666667 = 9.394526144 x = 9.394526144 Simplifying x = 9.394526144

Subproblem 2

x + -3.916666667 = -5.477859477 Simplifying x + -3.916666667 = -5.477859477 Reorder the terms: -3.916666667 + x = -5.477859477 Solving -3.916666667 + x = -5.477859477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.916666667' to each side of the equation. -3.916666667 + 3.916666667 + x = -5.477859477 + 3.916666667 Combine like terms: -3.916666667 + 3.916666667 = 0.000000000 0.000000000 + x = -5.477859477 + 3.916666667 x = -5.477859477 + 3.916666667 Combine like terms: -5.477859477 + 3.916666667 = -1.56119281 x = -1.56119281 Simplifying x = -1.56119281

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.394526144, -1.56119281}

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