6x^2+3x-320=0

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Solution for 6x^2+3x-320=0 equation:


Simplifying
6x2 + 3x + -320 = 0

Reorder the terms:
-320 + 3x + 6x2 = 0

Solving
-320 + 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'.
-53.33333333 + 0.5x + x2 = 0

Move the constant term to the right:

Add '53.33333333' to each side of the equation.
-53.33333333 + 0.5x + 53.33333333 + x2 = 0 + 53.33333333

Reorder the terms:
-53.33333333 + 53.33333333 + 0.5x + x2 = 0 + 53.33333333

Combine like terms: -53.33333333 + 53.33333333 = 0.00000000
0.00000000 + 0.5x + x2 = 0 + 53.33333333
0.5x + x2 = 0 + 53.33333333

Combine like terms: 0 + 53.33333333 = 53.33333333
0.5x + x2 = 53.33333333

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 = 53.33333333 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 53.33333333 + 0.0625

Combine like terms: 53.33333333 + 0.0625 = 53.39583333
0.0625 + 0.5x + x2 = 53.39583333

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 53.39583333

Calculate the square root of the right side: 7.307245263

Break this problem into two subproblems by setting 
(x + 0.25) equal to 7.307245263 and -7.307245263.

Subproblem 1

x + 0.25 = 7.307245263 Simplifying x + 0.25 = 7.307245263 Reorder the terms: 0.25 + x = 7.307245263 Solving 0.25 + x = 7.307245263 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 = 7.307245263 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 7.307245263 + -0.25 x = 7.307245263 + -0.25 Combine like terms: 7.307245263 + -0.25 = 7.057245263 x = 7.057245263 Simplifying x = 7.057245263

Subproblem 2

x + 0.25 = -7.307245263 Simplifying x + 0.25 = -7.307245263 Reorder the terms: 0.25 + x = -7.307245263 Solving 0.25 + x = -7.307245263 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 = -7.307245263 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -7.307245263 + -0.25 x = -7.307245263 + -0.25 Combine like terms: -7.307245263 + -0.25 = -7.557245263 x = -7.557245263 Simplifying x = -7.557245263

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.057245263, -7.557245263}

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