2x^2+14x+17=0

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Solution for 2x^2+14x+17=0 equation:


Simplifying
2x2 + 14x + 17 = 0

Reorder the terms:
17 + 14x + 2x2 = 0

Solving
17 + 14x + 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'.
8.5 + 7x + x2 = 0

Move the constant term to the right:

Add '-8.5' to each side of the equation.
8.5 + 7x + -8.5 + x2 = 0 + -8.5

Reorder the terms:
8.5 + -8.5 + 7x + x2 = 0 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + 7x + x2 = 0 + -8.5
7x + x2 = 0 + -8.5

Combine like terms: 0 + -8.5 = -8.5
7x + x2 = -8.5

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = -8.5 + 12.25

Reorder the terms:
12.25 + 7x + x2 = -8.5 + 12.25

Combine like terms: -8.5 + 12.25 = 3.75
12.25 + 7x + x2 = 3.75

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 3.75

Calculate the square root of the right side: 1.936491673

Break this problem into two subproblems by setting 
(x + 3.5) equal to 1.936491673 and -1.936491673.

Subproblem 1

x + 3.5 = 1.936491673 Simplifying x + 3.5 = 1.936491673 Reorder the terms: 3.5 + x = 1.936491673 Solving 3.5 + x = 1.936491673 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 1.936491673 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 1.936491673 + -3.5 x = 1.936491673 + -3.5 Combine like terms: 1.936491673 + -3.5 = -1.563508327 x = -1.563508327 Simplifying x = -1.563508327

Subproblem 2

x + 3.5 = -1.936491673 Simplifying x + 3.5 = -1.936491673 Reorder the terms: 3.5 + x = -1.936491673 Solving 3.5 + x = -1.936491673 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -1.936491673 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -1.936491673 + -3.5 x = -1.936491673 + -3.5 Combine like terms: -1.936491673 + -3.5 = -5.436491673 x = -5.436491673 Simplifying x = -5.436491673

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.563508327, -5.436491673}

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