2x^2-19x-12=0

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Solution for 2x^2-19x-12=0 equation:


Simplifying
2x2 + -19x + -12 = 0

Reorder the terms:
-12 + -19x + 2x2 = 0

Solving
-12 + -19x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-6 + -9.5x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -9.5x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -9.5x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -9.5x + x2 = 0 + 6
-9.5x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-9.5x + x2 = 6

The x term is -9.5x.  Take half its coefficient (-4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
-9.5x + 22.5625 + x2 = 6 + 22.5625

Reorder the terms:
22.5625 + -9.5x + x2 = 6 + 22.5625

Combine like terms: 6 + 22.5625 = 28.5625
22.5625 + -9.5x + x2 = 28.5625

Factor a perfect square on the left side:
(x + -4.75)(x + -4.75) = 28.5625

Calculate the square root of the right side: 5.344389582

Break this problem into two subproblems by setting 
(x + -4.75) equal to 5.344389582 and -5.344389582.

Subproblem 1

x + -4.75 = 5.344389582 Simplifying x + -4.75 = 5.344389582 Reorder the terms: -4.75 + x = 5.344389582 Solving -4.75 + x = 5.344389582 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = 5.344389582 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = 5.344389582 + 4.75 x = 5.344389582 + 4.75 Combine like terms: 5.344389582 + 4.75 = 10.094389582 x = 10.094389582 Simplifying x = 10.094389582

Subproblem 2

x + -4.75 = -5.344389582 Simplifying x + -4.75 = -5.344389582 Reorder the terms: -4.75 + x = -5.344389582 Solving -4.75 + x = -5.344389582 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = -5.344389582 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = -5.344389582 + 4.75 x = -5.344389582 + 4.75 Combine like terms: -5.344389582 + 4.75 = -0.594389582 x = -0.594389582 Simplifying x = -0.594389582

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.094389582, -0.594389582}

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