5x^2+38x+16=0

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Solution for 5x^2+38x+16=0 equation:


Simplifying
5x2 + 38x + 16 = 0

Reorder the terms:
16 + 38x + 5x2 = 0

Solving
16 + 38x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
3.2 + 7.6x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + 7.6x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + 7.6x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + 7.6x + x2 = 0 + -3.2
7.6x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
7.6x + x2 = -3.2

The x term is 7.6x.  Take half its coefficient (3.8).
Square it (14.44) and add it to both sides.

Add '14.44' to each side of the equation.
7.6x + 14.44 + x2 = -3.2 + 14.44

Reorder the terms:
14.44 + 7.6x + x2 = -3.2 + 14.44

Combine like terms: -3.2 + 14.44 = 11.24
14.44 + 7.6x + x2 = 11.24

Factor a perfect square on the left side:
(x + 3.8)(x + 3.8) = 11.24

Calculate the square root of the right side: 3.352610923

Break this problem into two subproblems by setting 
(x + 3.8) equal to 3.352610923 and -3.352610923.

Subproblem 1

x + 3.8 = 3.352610923 Simplifying x + 3.8 = 3.352610923 Reorder the terms: 3.8 + x = 3.352610923 Solving 3.8 + x = 3.352610923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.8' to each side of the equation. 3.8 + -3.8 + x = 3.352610923 + -3.8 Combine like terms: 3.8 + -3.8 = 0.0 0.0 + x = 3.352610923 + -3.8 x = 3.352610923 + -3.8 Combine like terms: 3.352610923 + -3.8 = -0.447389077 x = -0.447389077 Simplifying x = -0.447389077

Subproblem 2

x + 3.8 = -3.352610923 Simplifying x + 3.8 = -3.352610923 Reorder the terms: 3.8 + x = -3.352610923 Solving 3.8 + x = -3.352610923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.8' to each side of the equation. 3.8 + -3.8 + x = -3.352610923 + -3.8 Combine like terms: 3.8 + -3.8 = 0.0 0.0 + x = -3.352610923 + -3.8 x = -3.352610923 + -3.8 Combine like terms: -3.352610923 + -3.8 = -7.152610923 x = -7.152610923 Simplifying x = -7.152610923

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.447389077, -7.152610923}

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