2x^2+17x+2=0

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Solution for 2x^2+17x+2=0 equation:


Simplifying
2x2 + 17x + 2 = 0

Reorder the terms:
2 + 17x + 2x2 = 0

Solving
2 + 17x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
1 + 8.5x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 8.5x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + 8.5x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 8.5x + x2 = 0 + -1
8.5x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
8.5x + x2 = -1

The x term is 8.5x.  Take half its coefficient (4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
8.5x + 18.0625 + x2 = -1 + 18.0625

Reorder the terms:
18.0625 + 8.5x + x2 = -1 + 18.0625

Combine like terms: -1 + 18.0625 = 17.0625
18.0625 + 8.5x + x2 = 17.0625

Factor a perfect square on the left side:
(x + 4.25)(x + 4.25) = 17.0625

Calculate the square root of the right side: 4.13067791

Break this problem into two subproblems by setting 
(x + 4.25) equal to 4.13067791 and -4.13067791.

Subproblem 1

x + 4.25 = 4.13067791 Simplifying x + 4.25 = 4.13067791 Reorder the terms: 4.25 + x = 4.13067791 Solving 4.25 + x = 4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = 4.13067791 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = 4.13067791 + -4.25 x = 4.13067791 + -4.25 Combine like terms: 4.13067791 + -4.25 = -0.11932209 x = -0.11932209 Simplifying x = -0.11932209

Subproblem 2

x + 4.25 = -4.13067791 Simplifying x + 4.25 = -4.13067791 Reorder the terms: 4.25 + x = -4.13067791 Solving 4.25 + x = -4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = -4.13067791 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = -4.13067791 + -4.25 x = -4.13067791 + -4.25 Combine like terms: -4.13067791 + -4.25 = -8.38067791 x = -8.38067791 Simplifying x = -8.38067791

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.11932209, -8.38067791}

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