3x^2+17x-8.1=0

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Solution for 3x^2+17x-8.1=0 equation: 


Simplifying
3x2 + 17x + -8.1 = 0

Reorder the terms:
-8.1 + 17x + 3x2 = 0

Solving
-8.1 + 17x + 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'.
-2.7 + 5.666666667x + x2 = 0

Move the constant term to the right:

Add '2.7' to each side of the equation.
-2.7 + 5.666666667x + 2.7 + x2 = 0 + 2.7

Reorder the terms:
-2.7 + 2.7 + 5.666666667x + x2 = 0 + 2.7

Combine like terms: -2.7 + 2.7 = 0.0
0.0 + 5.666666667x + x2 = 0 + 2.7
5.666666667x + x2 = 0 + 2.7

Combine like terms: 0 + 2.7 = 2.7
5.666666667x + x2 = 2.7

The x term is 5.666666667x.  Take half its coefficient (2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
5.666666667x + 8.027777782 + x2 = 2.7 + 8.027777782

Reorder the terms:
8.027777782 + 5.666666667x + x2 = 2.7 + 8.027777782

Combine like terms: 2.7 + 8.027777782 = 10.727777782
8.027777782 + 5.666666667x + x2 = 10.727777782

Factor a perfect square on the left side:
(x + 2.833333334)(x + 2.833333334) = 10.727777782

Calculate the square root of the right side: 3.275328653

Break this problem into two subproblems by setting 
(x + 2.833333334) equal to 3.275328653 and -3.275328653.


Subproblem 1
x + 2.833333334 = 3.275328653

Simplifying
x + 2.833333334 = 3.275328653

Reorder the terms:
2.833333334 + x = 3.275328653

Solving
2.833333334 + x = 3.275328653

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.833333334' to each side of the equation.
2.833333334 + -2.833333334 + x = 3.275328653 + -2.833333334

Combine like terms: 2.833333334 + -2.833333334 = 0.000000000
0.000000000 + x = 3.275328653 + -2.833333334
x = 3.275328653 + -2.833333334

Combine like terms: 3.275328653 + -2.833333334 = 0.441995319
x = 0.441995319

Simplifying
x = 0.441995319


Subproblem 2
x + 2.833333334 = -3.275328653

Simplifying
x + 2.833333334 = -3.275328653

Reorder the terms:
2.833333334 + x = -3.275328653

Solving
2.833333334 + x = -3.275328653

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.833333334' to each side of the equation.
2.833333334 + -2.833333334 + x = -3.275328653 + -2.833333334

Combine like terms: 2.833333334 + -2.833333334 = 0.000000000
0.000000000 + x = -3.275328653 + -2.833333334
x = -3.275328653 + -2.833333334

Combine like terms: -3.275328653 + -2.833333334 = -6.108661987
x = -6.108661987

Simplifying
x = -6.108661987


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.441995319, -6.108661987}

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