3x^2+33x-6.7=0

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Solution for 3x^2+33x-6.7=0 equation:


Simplifying
3x2 + 33x + -6.7 = 0

Reorder the terms:
-6.7 + 33x + 3x2 = 0

Solving
-6.7 + 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'.
-2.233333333 + 11x + x2 = 0

Move the constant term to the right:

Add '2.233333333' to each side of the equation.
-2.233333333 + 11x + 2.233333333 + x2 = 0 + 2.233333333

Reorder the terms:
-2.233333333 + 2.233333333 + 11x + x2 = 0 + 2.233333333

Combine like terms: -2.233333333 + 2.233333333 = 0.000000000
0.000000000 + 11x + x2 = 0 + 2.233333333
11x + x2 = 0 + 2.233333333

Combine like terms: 0 + 2.233333333 = 2.233333333
11x + x2 = 2.233333333

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 = 2.233333333 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 2.233333333 + 30.25

Combine like terms: 2.233333333 + 30.25 = 32.483333333
30.25 + 11x + x2 = 32.483333333

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 32.483333333

Calculate the square root of the right side: 5.699415175

Break this problem into two subproblems by setting 
(x + 5.5) equal to 5.699415175 and -5.699415175.

Subproblem 1

x + 5.5 = 5.699415175 Simplifying x + 5.5 = 5.699415175 Reorder the terms: 5.5 + x = 5.699415175 Solving 5.5 + x = 5.699415175 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 = 5.699415175 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 5.699415175 + -5.5 x = 5.699415175 + -5.5 Combine like terms: 5.699415175 + -5.5 = 0.199415175 x = 0.199415175 Simplifying x = 0.199415175

Subproblem 2

x + 5.5 = -5.699415175 Simplifying x + 5.5 = -5.699415175 Reorder the terms: 5.5 + x = -5.699415175 Solving 5.5 + x = -5.699415175 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 = -5.699415175 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -5.699415175 + -5.5 x = -5.699415175 + -5.5 Combine like terms: -5.699415175 + -5.5 = -11.199415175 x = -11.199415175 Simplifying x = -11.199415175

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.199415175, -11.199415175}

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