8x^2+46x-19=0

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Solution for 8x^2+46x-19=0 equation:


Simplifying
8x2 + 46x + -19 = 0

Reorder the terms:
-19 + 46x + 8x2 = 0

Solving
-19 + 46x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-2.375 + 5.75x + x2 = 0

Move the constant term to the right:

Add '2.375' to each side of the equation.
-2.375 + 5.75x + 2.375 + x2 = 0 + 2.375

Reorder the terms:
-2.375 + 2.375 + 5.75x + x2 = 0 + 2.375

Combine like terms: -2.375 + 2.375 = 0.000
0.000 + 5.75x + x2 = 0 + 2.375
5.75x + x2 = 0 + 2.375

Combine like terms: 0 + 2.375 = 2.375
5.75x + x2 = 2.375

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 2.375 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 2.375 + 8.265625

Combine like terms: 2.375 + 8.265625 = 10.640625
8.265625 + 5.75x + x2 = 10.640625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 10.640625

Calculate the square root of the right side: 3.261997088

Break this problem into two subproblems by setting 
(x + 2.875) equal to 3.261997088 and -3.261997088.

Subproblem 1

x + 2.875 = 3.261997088 Simplifying x + 2.875 = 3.261997088 Reorder the terms: 2.875 + x = 3.261997088 Solving 2.875 + x = 3.261997088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 3.261997088 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 3.261997088 + -2.875 x = 3.261997088 + -2.875 Combine like terms: 3.261997088 + -2.875 = 0.386997088 x = 0.386997088 Simplifying x = 0.386997088

Subproblem 2

x + 2.875 = -3.261997088 Simplifying x + 2.875 = -3.261997088 Reorder the terms: 2.875 + x = -3.261997088 Solving 2.875 + x = -3.261997088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -3.261997088 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -3.261997088 + -2.875 x = -3.261997088 + -2.875 Combine like terms: -3.261997088 + -2.875 = -6.136997088 x = -6.136997088 Simplifying x = -6.136997088

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.386997088, -6.136997088}

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