0=-19x^2+38x+5

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Solution for 0=-19x^2+38x+5 equation:


Simplifying
0 = -19x2 + 38x + 5

Reorder the terms:
0 = 5 + 38x + -19x2

Solving
0 = 5 + 38x + -19x2

Solving for variable 'x'.

Combine like terms: 0 + -5 = -5
-5 + -38x + 19x2 = 5 + 38x + -19x2 + -5 + -38x + 19x2

Reorder the terms:
-5 + -38x + 19x2 = 5 + -5 + 38x + -38x + -19x2 + 19x2

Combine like terms: 5 + -5 = 0
-5 + -38x + 19x2 = 0 + 38x + -38x + -19x2 + 19x2
-5 + -38x + 19x2 = 38x + -38x + -19x2 + 19x2

Combine like terms: 38x + -38x = 0
-5 + -38x + 19x2 = 0 + -19x2 + 19x2
-5 + -38x + 19x2 = -19x2 + 19x2

Combine like terms: -19x2 + 19x2 = 0
-5 + -38x + 19x2 = 0

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

Divide each side by '19'.
-0.2631578947 + -2x + x2 = 0

Move the constant term to the right:

Add '0.2631578947' to each side of the equation.
-0.2631578947 + -2x + 0.2631578947 + x2 = 0 + 0.2631578947

Reorder the terms:
-0.2631578947 + 0.2631578947 + -2x + x2 = 0 + 0.2631578947

Combine like terms: -0.2631578947 + 0.2631578947 = 0.0000000000
0.0000000000 + -2x + x2 = 0 + 0.2631578947
-2x + x2 = 0 + 0.2631578947

Combine like terms: 0 + 0.2631578947 = 0.2631578947
-2x + x2 = 0.2631578947

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 0.2631578947 + 1

Reorder the terms:
1 + -2x + x2 = 0.2631578947 + 1

Combine like terms: 0.2631578947 + 1 = 1.2631578947
1 + -2x + x2 = 1.2631578947

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.2631578947

Calculate the square root of the right side: 1.123902974

Break this problem into two subproblems by setting 
(x + -1) equal to 1.123902974 and -1.123902974.

Subproblem 1

x + -1 = 1.123902974 Simplifying x + -1 = 1.123902974 Reorder the terms: -1 + x = 1.123902974 Solving -1 + x = 1.123902974 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.123902974 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.123902974 + 1 x = 1.123902974 + 1 Combine like terms: 1.123902974 + 1 = 2.123902974 x = 2.123902974 Simplifying x = 2.123902974

Subproblem 2

x + -1 = -1.123902974 Simplifying x + -1 = -1.123902974 Reorder the terms: -1 + x = -1.123902974 Solving -1 + x = -1.123902974 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.123902974 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.123902974 + 1 x = -1.123902974 + 1 Combine like terms: -1.123902974 + 1 = -0.123902974 x = -0.123902974 Simplifying x = -0.123902974

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.123902974, -0.123902974}

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