2x^2+45x-500=0

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Solution for 2x^2+45x-500=0 equation:


Simplifying
2x2 + 45x + -500 = 0

Reorder the terms:
-500 + 45x + 2x2 = 0

Solving
-500 + 45x + 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'.
-250 + 22.5x + x2 = 0

Move the constant term to the right:

Add '250' to each side of the equation.
-250 + 22.5x + 250 + x2 = 0 + 250

Reorder the terms:
-250 + 250 + 22.5x + x2 = 0 + 250

Combine like terms: -250 + 250 = 0
0 + 22.5x + x2 = 0 + 250
22.5x + x2 = 0 + 250

Combine like terms: 0 + 250 = 250
22.5x + x2 = 250

The x term is 22.5x.  Take half its coefficient (11.25).
Square it (126.5625) and add it to both sides.

Add '126.5625' to each side of the equation.
22.5x + 126.5625 + x2 = 250 + 126.5625

Reorder the terms:
126.5625 + 22.5x + x2 = 250 + 126.5625

Combine like terms: 250 + 126.5625 = 376.5625
126.5625 + 22.5x + x2 = 376.5625

Factor a perfect square on the left side:
(x + 11.25)(x + 11.25) = 376.5625

Calculate the square root of the right side: 19.40521837

Break this problem into two subproblems by setting 
(x + 11.25) equal to 19.40521837 and -19.40521837.

Subproblem 1

x + 11.25 = 19.40521837 Simplifying x + 11.25 = 19.40521837 Reorder the terms: 11.25 + x = 19.40521837 Solving 11.25 + x = 19.40521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = 19.40521837 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = 19.40521837 + -11.25 x = 19.40521837 + -11.25 Combine like terms: 19.40521837 + -11.25 = 8.15521837 x = 8.15521837 Simplifying x = 8.15521837

Subproblem 2

x + 11.25 = -19.40521837 Simplifying x + 11.25 = -19.40521837 Reorder the terms: 11.25 + x = -19.40521837 Solving 11.25 + x = -19.40521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = -19.40521837 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = -19.40521837 + -11.25 x = -19.40521837 + -11.25 Combine like terms: -19.40521837 + -11.25 = -30.65521837 x = -30.65521837 Simplifying x = -30.65521837

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.15521837, -30.65521837}

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