5x^2+19x+2=0

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Solution for 5x^2+19x+2=0 equation:


Simplifying
5x2 + 19x + 2 = 0

Reorder the terms:
2 + 19x + 5x2 = 0

Solving
2 + 19x + 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'.
0.4 + 3.8x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + 3.8x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + 3.8x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 3.8x + x2 = 0 + -0.4
3.8x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
3.8x + x2 = -0.4

The x term is 3.8x.  Take half its coefficient (1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
3.8x + 3.61 + x2 = -0.4 + 3.61

Reorder the terms:
3.61 + 3.8x + x2 = -0.4 + 3.61

Combine like terms: -0.4 + 3.61 = 3.21
3.61 + 3.8x + x2 = 3.21

Factor a perfect square on the left side:
(x + 1.9)(x + 1.9) = 3.21

Calculate the square root of the right side: 1.791647287

Break this problem into two subproblems by setting 
(x + 1.9) equal to 1.791647287 and -1.791647287.

Subproblem 1

x + 1.9 = 1.791647287 Simplifying x + 1.9 = 1.791647287 Reorder the terms: 1.9 + x = 1.791647287 Solving 1.9 + x = 1.791647287 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = 1.791647287 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 1.791647287 + -1.9 x = 1.791647287 + -1.9 Combine like terms: 1.791647287 + -1.9 = -0.108352713 x = -0.108352713 Simplifying x = -0.108352713

Subproblem 2

x + 1.9 = -1.791647287 Simplifying x + 1.9 = -1.791647287 Reorder the terms: 1.9 + x = -1.791647287 Solving 1.9 + x = -1.791647287 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = -1.791647287 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -1.791647287 + -1.9 x = -1.791647287 + -1.9 Combine like terms: -1.791647287 + -1.9 = -3.691647287 x = -3.691647287 Simplifying x = -3.691647287

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.108352713, -3.691647287}

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