5x^2-19x-5=0

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


Simplifying
5x2 + -19x + -5 = 0

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

Solving
-5 + -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'.
-1 + -3.8x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -3.8x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -3.8x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -3.8x + x2 = 0 + 1
-3.8x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-3.8x + x2 = 1

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 = 1 + 3.61

Reorder the terms:
3.61 + -3.8x + x2 = 1 + 3.61

Combine like terms: 1 + 3.61 = 4.61
3.61 + -3.8x + x2 = 4.61

Factor a perfect square on the left side:
(x + -1.9)(x + -1.9) = 4.61

Calculate the square root of the right side: 2.147091055

Break this problem into two subproblems by setting 
(x + -1.9) equal to 2.147091055 and -2.147091055.

Subproblem 1

x + -1.9 = 2.147091055 Simplifying x + -1.9 = 2.147091055 Reorder the terms: -1.9 + x = 2.147091055 Solving -1.9 + x = 2.147091055 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 = 2.147091055 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = 2.147091055 + 1.9 x = 2.147091055 + 1.9 Combine like terms: 2.147091055 + 1.9 = 4.047091055 x = 4.047091055 Simplifying x = 4.047091055

Subproblem 2

x + -1.9 = -2.147091055 Simplifying x + -1.9 = -2.147091055 Reorder the terms: -1.9 + x = -2.147091055 Solving -1.9 + x = -2.147091055 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 = -2.147091055 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = -2.147091055 + 1.9 x = -2.147091055 + 1.9 Combine like terms: -2.147091055 + 1.9 = -0.247091055 x = -0.247091055 Simplifying x = -0.247091055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.047091055, -0.247091055}

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