-0.0005x^2+45x=1000000

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Solution for -0.0005x^2+45x=1000000 equation:


Simplifying
-0.0005x2 + 45x = 1000000

Reorder the terms:
45x + -0.0005x2 = 1000000

Solving
45x + -0.0005x2 = 1000000

Solving for variable 'x'.

Reorder the terms:
-1000000 + 45x + -0.0005x2 = 1000000 + -1000000

Combine like terms: 1000000 + -1000000 = 0
-1000000 + 45x + -0.0005x2 = 0

Begin completing the square.  Divide all terms by
-0.0005 the coefficient of the squared term: 

Divide each side by '-0.0005'.
2000000000 + -90000x + x2 = 0

Move the constant term to the right:

Add '-2000000000' to each side of the equation.
2000000000 + -90000x + -2000000000 + x2 = 0 + -2000000000

Reorder the terms:
2000000000 + -2000000000 + -90000x + x2 = 0 + -2000000000

Combine like terms: 2000000000 + -2000000000 = 0
0 + -90000x + x2 = 0 + -2000000000
-90000x + x2 = 0 + -2000000000

Combine like terms: 0 + -2000000000 = -2000000000
-90000x + x2 = -2000000000

The x term is -90000x.  Take half its coefficient (-45000).
Square it (2025000000) and add it to both sides.

Add '2025000000' to each side of the equation.
-90000x + 2025000000 + x2 = -2000000000 + 2025000000

Reorder the terms:
2025000000 + -90000x + x2 = -2000000000 + 2025000000

Combine like terms: -2000000000 + 2025000000 = 25000000
2025000000 + -90000x + x2 = 25000000

Factor a perfect square on the left side:
(x + -45000)(x + -45000) = 25000000

Calculate the square root of the right side: 5000

Break this problem into two subproblems by setting 
(x + -45000) equal to 5000 and -5000.

Subproblem 1

x + -45000 = 5000 Simplifying x + -45000 = 5000 Reorder the terms: -45000 + x = 5000 Solving -45000 + x = 5000 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45000' to each side of the equation. -45000 + 45000 + x = 5000 + 45000 Combine like terms: -45000 + 45000 = 0 0 + x = 5000 + 45000 x = 5000 + 45000 Combine like terms: 5000 + 45000 = 50000 x = 50000 Simplifying x = 50000

Subproblem 2

x + -45000 = -5000 Simplifying x + -45000 = -5000 Reorder the terms: -45000 + x = -5000 Solving -45000 + x = -5000 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45000' to each side of the equation. -45000 + 45000 + x = -5000 + 45000 Combine like terms: -45000 + 45000 = 0 0 + x = -5000 + 45000 x = -5000 + 45000 Combine like terms: -5000 + 45000 = 40000 x = 40000 Simplifying x = 40000

Solution

The solution to the problem is based on the solutions from the subproblems. x = {50000, 40000}

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