x^2+615x-405000=0

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Solution for x^2+615x-405000=0 equation:


Simplifying
x2 + 615x + -405000 = 0

Reorder the terms:
-405000 + 615x + x2 = 0

Solving
-405000 + 615x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '405000' to each side of the equation.
-405000 + 615x + 405000 + x2 = 0 + 405000

Reorder the terms:
-405000 + 405000 + 615x + x2 = 0 + 405000

Combine like terms: -405000 + 405000 = 0
0 + 615x + x2 = 0 + 405000
615x + x2 = 0 + 405000

Combine like terms: 0 + 405000 = 405000
615x + x2 = 405000

The x term is 615x.  Take half its coefficient (307.5).
Square it (94556.25) and add it to both sides.

Add '94556.25' to each side of the equation.
615x + 94556.25 + x2 = 405000 + 94556.25

Reorder the terms:
94556.25 + 615x + x2 = 405000 + 94556.25

Combine like terms: 405000 + 94556.25 = 499556.25
94556.25 + 615x + x2 = 499556.25

Factor a perfect square on the left side:
(x + 307.5)(x + 307.5) = 499556.25

Calculate the square root of the right side: 706.792932902

Break this problem into two subproblems by setting 
(x + 307.5) equal to 706.792932902 and -706.792932902.

Subproblem 1

x + 307.5 = 706.792932902 Simplifying x + 307.5 = 706.792932902 Reorder the terms: 307.5 + x = 706.792932902 Solving 307.5 + x = 706.792932902 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-307.5' to each side of the equation. 307.5 + -307.5 + x = 706.792932902 + -307.5 Combine like terms: 307.5 + -307.5 = 0.0 0.0 + x = 706.792932902 + -307.5 x = 706.792932902 + -307.5 Combine like terms: 706.792932902 + -307.5 = 399.292932902 x = 399.292932902 Simplifying x = 399.292932902

Subproblem 2

x + 307.5 = -706.792932902 Simplifying x + 307.5 = -706.792932902 Reorder the terms: 307.5 + x = -706.792932902 Solving 307.5 + x = -706.792932902 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-307.5' to each side of the equation. 307.5 + -307.5 + x = -706.792932902 + -307.5 Combine like terms: 307.5 + -307.5 = 0.0 0.0 + x = -706.792932902 + -307.5 x = -706.792932902 + -307.5 Combine like terms: -706.792932902 + -307.5 = -1014.292932902 x = -1014.292932902 Simplifying x = -1014.292932902

Solution

The solution to the problem is based on the solutions from the subproblems. x = {399.292932902, -1014.292932902}

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