0.5x^2+3x-19=0

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Solution for 0.5x^2+3x-19=0 equation:


Simplifying
0.5x2 + 3x + -19 = 0

Reorder the terms:
-19 + 3x + 0.5x2 = 0

Solving
-19 + 3x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
-38 + 6x + x2 = 0

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + 6x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + 6x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + 6x + x2 = 0 + 38
6x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
6x + x2 = 38

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 38 + 9

Reorder the terms:
9 + 6x + x2 = 38 + 9

Combine like terms: 38 + 9 = 47
9 + 6x + x2 = 47

Factor a perfect square on the left side:
(x + 3)(x + 3) = 47

Calculate the square root of the right side: 6.8556546

Break this problem into two subproblems by setting 
(x + 3) equal to 6.8556546 and -6.8556546.

Subproblem 1

x + 3 = 6.8556546 Simplifying x + 3 = 6.8556546 Reorder the terms: 3 + x = 6.8556546 Solving 3 + x = 6.8556546 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 6.8556546 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.8556546 + -3 x = 6.8556546 + -3 Combine like terms: 6.8556546 + -3 = 3.8556546 x = 3.8556546 Simplifying x = 3.8556546

Subproblem 2

x + 3 = -6.8556546 Simplifying x + 3 = -6.8556546 Reorder the terms: 3 + x = -6.8556546 Solving 3 + x = -6.8556546 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -6.8556546 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.8556546 + -3 x = -6.8556546 + -3 Combine like terms: -6.8556546 + -3 = -9.8556546 x = -9.8556546 Simplifying x = -9.8556546

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.8556546, -9.8556546}

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