2x^2+15x+19=0

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Solution for 2x^2+15x+19=0 equation:


Simplifying
2x2 + 15x + 19 = 0

Reorder the terms:
19 + 15x + 2x2 = 0

Solving
19 + 15x + 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'.
9.5 + 7.5x + x2 = 0

Move the constant term to the right:

Add '-9.5' to each side of the equation.
9.5 + 7.5x + -9.5 + x2 = 0 + -9.5

Reorder the terms:
9.5 + -9.5 + 7.5x + x2 = 0 + -9.5

Combine like terms: 9.5 + -9.5 = 0.0
0.0 + 7.5x + x2 = 0 + -9.5
7.5x + x2 = 0 + -9.5

Combine like terms: 0 + -9.5 = -9.5
7.5x + x2 = -9.5

The x term is 7.5x.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5x + 14.0625 + x2 = -9.5 + 14.0625

Reorder the terms:
14.0625 + 7.5x + x2 = -9.5 + 14.0625

Combine like terms: -9.5 + 14.0625 = 4.5625
14.0625 + 7.5x + x2 = 4.5625

Factor a perfect square on the left side:
(x + 3.75)(x + 3.75) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(x + 3.75) equal to 2.136000936 and -2.136000936.

Subproblem 1

x + 3.75 = 2.136000936 Simplifying x + 3.75 = 2.136000936 Reorder the terms: 3.75 + x = 2.136000936 Solving 3.75 + x = 2.136000936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = 2.136000936 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = 2.136000936 + -3.75 x = 2.136000936 + -3.75 Combine like terms: 2.136000936 + -3.75 = -1.613999064 x = -1.613999064 Simplifying x = -1.613999064

Subproblem 2

x + 3.75 = -2.136000936 Simplifying x + 3.75 = -2.136000936 Reorder the terms: 3.75 + x = -2.136000936 Solving 3.75 + x = -2.136000936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = -2.136000936 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = -2.136000936 + -3.75 x = -2.136000936 + -3.75 Combine like terms: -2.136000936 + -3.75 = -5.886000936 x = -5.886000936 Simplifying x = -5.886000936

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.613999064, -5.886000936}

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