x^2+400x-45000=0

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Solution for x^2+400x-45000=0 equation:


Simplifying
x2 + 400x + -45000 = 0

Reorder the terms:
-45000 + 400x + x2 = 0

Solving
-45000 + 400x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '45000' to each side of the equation.
-45000 + 400x + 45000 + x2 = 0 + 45000

Reorder the terms:
-45000 + 45000 + 400x + x2 = 0 + 45000

Combine like terms: -45000 + 45000 = 0
0 + 400x + x2 = 0 + 45000
400x + x2 = 0 + 45000

Combine like terms: 0 + 45000 = 45000
400x + x2 = 45000

The x term is 400x.  Take half its coefficient (200).
Square it (40000) and add it to both sides.

Add '40000' to each side of the equation.
400x + 40000 + x2 = 45000 + 40000

Reorder the terms:
40000 + 400x + x2 = 45000 + 40000

Combine like terms: 45000 + 40000 = 85000
40000 + 400x + x2 = 85000

Factor a perfect square on the left side:
(x + 200)(x + 200) = 85000

Calculate the square root of the right side: 291.547594742

Break this problem into two subproblems by setting 
(x + 200) equal to 291.547594742 and -291.547594742.

Subproblem 1

x + 200 = 291.547594742 Simplifying x + 200 = 291.547594742 Reorder the terms: 200 + x = 291.547594742 Solving 200 + x = 291.547594742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + x = 291.547594742 + -200 Combine like terms: 200 + -200 = 0 0 + x = 291.547594742 + -200 x = 291.547594742 + -200 Combine like terms: 291.547594742 + -200 = 91.547594742 x = 91.547594742 Simplifying x = 91.547594742

Subproblem 2

x + 200 = -291.547594742 Simplifying x + 200 = -291.547594742 Reorder the terms: 200 + x = -291.547594742 Solving 200 + x = -291.547594742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + x = -291.547594742 + -200 Combine like terms: 200 + -200 = 0 0 + x = -291.547594742 + -200 x = -291.547594742 + -200 Combine like terms: -291.547594742 + -200 = -491.547594742 x = -491.547594742 Simplifying x = -491.547594742

Solution

The solution to the problem is based on the solutions from the subproblems. x = {91.547594742, -491.547594742}

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