3x^2+33x-8.3=0

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Solution for 3x^2+33x-8.3=0 equation:


Simplifying
3x2 + 33x + -8.3 = 0

Reorder the terms:
-8.3 + 33x + 3x2 = 0

Solving
-8.3 + 33x + 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'.
-2.766666667 + 11x + x2 = 0

Move the constant term to the right:

Add '2.766666667' to each side of the equation.
-2.766666667 + 11x + 2.766666667 + x2 = 0 + 2.766666667

Reorder the terms:
-2.766666667 + 2.766666667 + 11x + x2 = 0 + 2.766666667

Combine like terms: -2.766666667 + 2.766666667 = 0.000000000
0.000000000 + 11x + x2 = 0 + 2.766666667
11x + x2 = 0 + 2.766666667

Combine like terms: 0 + 2.766666667 = 2.766666667
11x + x2 = 2.766666667

The x term is 11x.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11x + 30.25 + x2 = 2.766666667 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 2.766666667 + 30.25

Combine like terms: 2.766666667 + 30.25 = 33.016666667
30.25 + 11x + x2 = 33.016666667

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 33.016666667

Calculate the square root of the right side: 5.746013111

Break this problem into two subproblems by setting 
(x + 5.5) equal to 5.746013111 and -5.746013111.

Subproblem 1

x + 5.5 = 5.746013111 Simplifying x + 5.5 = 5.746013111 Reorder the terms: 5.5 + x = 5.746013111 Solving 5.5 + x = 5.746013111 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 5.746013111 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 5.746013111 + -5.5 x = 5.746013111 + -5.5 Combine like terms: 5.746013111 + -5.5 = 0.246013111 x = 0.246013111 Simplifying x = 0.246013111

Subproblem 2

x + 5.5 = -5.746013111 Simplifying x + 5.5 = -5.746013111 Reorder the terms: 5.5 + x = -5.746013111 Solving 5.5 + x = -5.746013111 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -5.746013111 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -5.746013111 + -5.5 x = -5.746013111 + -5.5 Combine like terms: -5.746013111 + -5.5 = -11.246013111 x = -11.246013111 Simplifying x = -11.246013111

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.246013111, -11.246013111}

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