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 = 4.01
3.61 + 3.8x + x2 = 4.01

Factor a perfect square on the left side:
(x + 1.9)(x + 1.9) = 4.01

Calculate the square root of the right side: 2.002498439

Break this problem into two subproblems by setting 
(x + 1.9) equal to 2.002498439 and -2.002498439.

Subproblem 1

x + 1.9 = 2.002498439 Simplifying x + 1.9 = 2.002498439 Reorder the terms: 1.9 + x = 2.002498439 Solving 1.9 + x = 2.002498439 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 = 2.002498439 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 2.002498439 + -1.9 x = 2.002498439 + -1.9 Combine like terms: 2.002498439 + -1.9 = 0.102498439 x = 0.102498439 Simplifying x = 0.102498439

Subproblem 2

x + 1.9 = -2.002498439 Simplifying x + 1.9 = -2.002498439 Reorder the terms: 1.9 + x = -2.002498439 Solving 1.9 + x = -2.002498439 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 = -2.002498439 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -2.002498439 + -1.9 x = -2.002498439 + -1.9 Combine like terms: -2.002498439 + -1.9 = -3.902498439 x = -3.902498439 Simplifying x = -3.902498439

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.102498439, -3.902498439}

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