2x^2+16x+13=0

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Solution for 2x^2+16x+13=0 equation:


Simplifying
2x2 + 16x + 13 = 0

Reorder the terms:
13 + 16x + 2x2 = 0

Solving
13 + 16x + 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'.
6.5 + 8x + x2 = 0

Move the constant term to the right:

Add '-6.5' to each side of the equation.
6.5 + 8x + -6.5 + x2 = 0 + -6.5

Reorder the terms:
6.5 + -6.5 + 8x + x2 = 0 + -6.5

Combine like terms: 6.5 + -6.5 = 0.0
0.0 + 8x + x2 = 0 + -6.5
8x + x2 = 0 + -6.5

Combine like terms: 0 + -6.5 = -6.5
8x + x2 = -6.5

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -6.5 + 16

Reorder the terms:
16 + 8x + x2 = -6.5 + 16

Combine like terms: -6.5 + 16 = 9.5
16 + 8x + x2 = 9.5

Factor a perfect square on the left side:
(x + 4)(x + 4) = 9.5

Calculate the square root of the right side: 3.082207001

Break this problem into two subproblems by setting 
(x + 4) equal to 3.082207001 and -3.082207001.

Subproblem 1

x + 4 = 3.082207001 Simplifying x + 4 = 3.082207001 Reorder the terms: 4 + x = 3.082207001 Solving 4 + x = 3.082207001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 3.082207001 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3.082207001 + -4 x = 3.082207001 + -4 Combine like terms: 3.082207001 + -4 = -0.917792999 x = -0.917792999 Simplifying x = -0.917792999

Subproblem 2

x + 4 = -3.082207001 Simplifying x + 4 = -3.082207001 Reorder the terms: 4 + x = -3.082207001 Solving 4 + x = -3.082207001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -3.082207001 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3.082207001 + -4 x = -3.082207001 + -4 Combine like terms: -3.082207001 + -4 = -7.082207001 x = -7.082207001 Simplifying x = -7.082207001

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.917792999, -7.082207001}

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