2x^2-9x-3360=0

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Solution for 2x^2-9x-3360=0 equation:


Simplifying
2x2 + -9x + -3360 = 0

Reorder the terms:
-3360 + -9x + 2x2 = 0

Solving
-3360 + -9x + 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'.
-1680 + -4.5x + x2 = 0

Move the constant term to the right:

Add '1680' to each side of the equation.
-1680 + -4.5x + 1680 + x2 = 0 + 1680

Reorder the terms:
-1680 + 1680 + -4.5x + x2 = 0 + 1680

Combine like terms: -1680 + 1680 = 0
0 + -4.5x + x2 = 0 + 1680
-4.5x + x2 = 0 + 1680

Combine like terms: 0 + 1680 = 1680
-4.5x + x2 = 1680

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = 1680 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = 1680 + 5.0625

Combine like terms: 1680 + 5.0625 = 1685.0625
5.0625 + -4.5x + x2 = 1685.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 1685.0625

Calculate the square root of the right side: 41.049512786

Break this problem into two subproblems by setting 
(x + -2.25) equal to 41.049512786 and -41.049512786.

Subproblem 1

x + -2.25 = 41.049512786 Simplifying x + -2.25 = 41.049512786 Reorder the terms: -2.25 + x = 41.049512786 Solving -2.25 + x = 41.049512786 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 41.049512786 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 41.049512786 + 2.25 x = 41.049512786 + 2.25 Combine like terms: 41.049512786 + 2.25 = 43.299512786 x = 43.299512786 Simplifying x = 43.299512786

Subproblem 2

x + -2.25 = -41.049512786 Simplifying x + -2.25 = -41.049512786 Reorder the terms: -2.25 + x = -41.049512786 Solving -2.25 + x = -41.049512786 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -41.049512786 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -41.049512786 + 2.25 x = -41.049512786 + 2.25 Combine like terms: -41.049512786 + 2.25 = -38.799512786 x = -38.799512786 Simplifying x = -38.799512786

Solution

The solution to the problem is based on the solutions from the subproblems. x = {43.299512786, -38.799512786}

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