2x^2+9x=3500

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Solution for 2x^2+9x=3500 equation:


Simplifying
2x2 + 9x = 3500

Reorder the terms:
9x + 2x2 = 3500

Solving
9x + 2x2 = 3500

Solving for variable 'x'.

Reorder the terms:
-3500 + 9x + 2x2 = 3500 + -3500

Combine like terms: 3500 + -3500 = 0
-3500 + 9x + 2x2 = 0

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

Divide each side by '2'.
-1750 + 4.5x + x2 = 0

Move the constant term to the right:

Add '1750' to each side of the equation.
-1750 + 4.5x + 1750 + x2 = 0 + 1750

Reorder the terms:
-1750 + 1750 + 4.5x + x2 = 0 + 1750

Combine like terms: -1750 + 1750 = 0
0 + 4.5x + x2 = 0 + 1750
4.5x + x2 = 0 + 1750

Combine like terms: 0 + 1750 = 1750
4.5x + x2 = 1750

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 = 1750 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 1750 + 5.0625

Combine like terms: 1750 + 5.0625 = 1755.0625
5.0625 + 4.5x + x2 = 1755.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 1755.0625

Calculate the square root of the right side: 41.893466078

Break this problem into two subproblems by setting 
(x + 2.25) equal to 41.893466078 and -41.893466078.

Subproblem 1

x + 2.25 = 41.893466078 Simplifying x + 2.25 = 41.893466078 Reorder the terms: 2.25 + x = 41.893466078 Solving 2.25 + x = 41.893466078 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 = 41.893466078 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 41.893466078 + -2.25 x = 41.893466078 + -2.25 Combine like terms: 41.893466078 + -2.25 = 39.643466078 x = 39.643466078 Simplifying x = 39.643466078

Subproblem 2

x + 2.25 = -41.893466078 Simplifying x + 2.25 = -41.893466078 Reorder the terms: 2.25 + x = -41.893466078 Solving 2.25 + x = -41.893466078 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 = -41.893466078 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -41.893466078 + -2.25 x = -41.893466078 + -2.25 Combine like terms: -41.893466078 + -2.25 = -44.143466078 x = -44.143466078 Simplifying x = -44.143466078

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.643466078, -44.143466078}

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