216x^2+3x-14=0

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Solution for 216x^2+3x-14=0 equation:


Simplifying
216x2 + 3x + -14 = 0

Reorder the terms:
-14 + 3x + 216x2 = 0

Solving
-14 + 3x + 216x2 = 0

Solving for variable 'x'.

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

Divide each side by '216'.
-0.06481481481 + 0.01388888889x + x2 = 0

Move the constant term to the right:

Add '0.06481481481' to each side of the equation.
-0.06481481481 + 0.01388888889x + 0.06481481481 + x2 = 0 + 0.06481481481

Reorder the terms:
-0.06481481481 + 0.06481481481 + 0.01388888889x + x2 = 0 + 0.06481481481

Combine like terms: -0.06481481481 + 0.06481481481 = 0.00000000000
0.00000000000 + 0.01388888889x + x2 = 0 + 0.06481481481
0.01388888889x + x2 = 0 + 0.06481481481

Combine like terms: 0 + 0.06481481481 = 0.06481481481
0.01388888889x + x2 = 0.06481481481

The x term is 0.01388888889x.  Take half its coefficient (0.006944444445).
Square it (0.00004822530865) and add it to both sides.

Add '0.00004822530865' to each side of the equation.
0.01388888889x + 0.00004822530865 + x2 = 0.06481481481 + 0.00004822530865

Reorder the terms:
0.00004822530865 + 0.01388888889x + x2 = 0.06481481481 + 0.00004822530865

Combine like terms: 0.06481481481 + 0.00004822530865 = 0.06486304011865
0.00004822530865 + 0.01388888889x + x2 = 0.06486304011865

Factor a perfect square on the left side:
(x + 0.006944444445)(x + 0.006944444445) = 0.06486304011865

Calculate the square root of the right side: 0.254682234

Break this problem into two subproblems by setting 
(x + 0.006944444445) equal to 0.254682234 and -0.254682234.

Subproblem 1

x + 0.006944444445 = 0.254682234 Simplifying x + 0.006944444445 = 0.254682234 Reorder the terms: 0.006944444445 + x = 0.254682234 Solving 0.006944444445 + x = 0.254682234 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.006944444445' to each side of the equation. 0.006944444445 + -0.006944444445 + x = 0.254682234 + -0.006944444445 Combine like terms: 0.006944444445 + -0.006944444445 = 0.000000000000 0.000000000000 + x = 0.254682234 + -0.006944444445 x = 0.254682234 + -0.006944444445 Combine like terms: 0.254682234 + -0.006944444445 = 0.247737789555 x = 0.247737789555 Simplifying x = 0.247737789555

Subproblem 2

x + 0.006944444445 = -0.254682234 Simplifying x + 0.006944444445 = -0.254682234 Reorder the terms: 0.006944444445 + x = -0.254682234 Solving 0.006944444445 + x = -0.254682234 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.006944444445' to each side of the equation. 0.006944444445 + -0.006944444445 + x = -0.254682234 + -0.006944444445 Combine like terms: 0.006944444445 + -0.006944444445 = 0.000000000000 0.000000000000 + x = -0.254682234 + -0.006944444445 x = -0.254682234 + -0.006944444445 Combine like terms: -0.254682234 + -0.006944444445 = -0.261626678445 x = -0.261626678445 Simplifying x = -0.261626678445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.247737789555, -0.261626678445}

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