x^2+45x-20000=0

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Solution for x^2+45x-20000=0 equation:


Simplifying
x2 + 45x + -20000 = 0

Reorder the terms:
-20000 + 45x + x2 = 0

Solving
-20000 + 45x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '20000' to each side of the equation.
-20000 + 45x + 20000 + x2 = 0 + 20000

Reorder the terms:
-20000 + 20000 + 45x + x2 = 0 + 20000

Combine like terms: -20000 + 20000 = 0
0 + 45x + x2 = 0 + 20000
45x + x2 = 0 + 20000

Combine like terms: 0 + 20000 = 20000
45x + x2 = 20000

The x term is 45x.  Take half its coefficient (22.5).
Square it (506.25) and add it to both sides.

Add '506.25' to each side of the equation.
45x + 506.25 + x2 = 20000 + 506.25

Reorder the terms:
506.25 + 45x + x2 = 20000 + 506.25

Combine like terms: 20000 + 506.25 = 20506.25
506.25 + 45x + x2 = 20506.25

Factor a perfect square on the left side:
(x + 22.5)(x + 22.5) = 20506.25

Calculate the square root of the right side: 143.200034916

Break this problem into two subproblems by setting 
(x + 22.5) equal to 143.200034916 and -143.200034916.

Subproblem 1

x + 22.5 = 143.200034916 Simplifying x + 22.5 = 143.200034916 Reorder the terms: 22.5 + x = 143.200034916 Solving 22.5 + x = 143.200034916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22.5' to each side of the equation. 22.5 + -22.5 + x = 143.200034916 + -22.5 Combine like terms: 22.5 + -22.5 = 0.0 0.0 + x = 143.200034916 + -22.5 x = 143.200034916 + -22.5 Combine like terms: 143.200034916 + -22.5 = 120.700034916 x = 120.700034916 Simplifying x = 120.700034916

Subproblem 2

x + 22.5 = -143.200034916 Simplifying x + 22.5 = -143.200034916 Reorder the terms: 22.5 + x = -143.200034916 Solving 22.5 + x = -143.200034916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22.5' to each side of the equation. 22.5 + -22.5 + x = -143.200034916 + -22.5 Combine like terms: 22.5 + -22.5 = 0.0 0.0 + x = -143.200034916 + -22.5 x = -143.200034916 + -22.5 Combine like terms: -143.200034916 + -22.5 = -165.700034916 x = -165.700034916 Simplifying x = -165.700034916

Solution

The solution to the problem is based on the solutions from the subproblems. x = {120.700034916, -165.700034916}

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