(x)=-0.04x^2+240x-10000

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Solution for (x)=-0.04x^2+240x-10000 equation:


Simplifying
(x) = -0.04x2 + 240x + -10000
x = -0.04x2 + 240x + -10000

Reorder the terms:
x = -10000 + 240x + -0.04x2

Solving
x = -10000 + 240x + -0.04x2

Solving for variable 'x'.

Reorder the terms:
10000 + x + -240x + 0.04x2 = -10000 + 240x + -0.04x2 + 10000 + -240x + 0.04x2

Combine like terms: x + -240x = -239x
10000 + -239x + 0.04x2 = -10000 + 240x + -0.04x2 + 10000 + -240x + 0.04x2

Reorder the terms:
10000 + -239x + 0.04x2 = -10000 + 10000 + 240x + -240x + -0.04x2 + 0.04x2

Combine like terms: -10000 + 10000 = 0
10000 + -239x + 0.04x2 = 0 + 240x + -240x + -0.04x2 + 0.04x2
10000 + -239x + 0.04x2 = 240x + -240x + -0.04x2 + 0.04x2

Combine like terms: 240x + -240x = 0
10000 + -239x + 0.04x2 = 0 + -0.04x2 + 0.04x2
10000 + -239x + 0.04x2 = -0.04x2 + 0.04x2

Combine like terms: -0.04x2 + 0.04x2 = 0.00
10000 + -239x + 0.04x2 = 0.00

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

Divide each side by '0.04'.
250000 + -5975x + x2 = 0

Move the constant term to the right:

Add '-250000' to each side of the equation.
250000 + -5975x + -250000 + x2 = 0 + -250000

Reorder the terms:
250000 + -250000 + -5975x + x2 = 0 + -250000

Combine like terms: 250000 + -250000 = 0
0 + -5975x + x2 = 0 + -250000
-5975x + x2 = 0 + -250000

Combine like terms: 0 + -250000 = -250000
-5975x + x2 = -250000

The x term is -5975x.  Take half its coefficient (-2987.5).
Square it (8925156.25) and add it to both sides.

Add '8925156.25' to each side of the equation.
-5975x + 8925156.25 + x2 = -250000 + 8925156.25

Reorder the terms:
8925156.25 + -5975x + x2 = -250000 + 8925156.25

Combine like terms: -250000 + 8925156.25 = 8675156.25
8925156.25 + -5975x + x2 = 8675156.25

Factor a perfect square on the left side:
(x + -2987.5)(x + -2987.5) = 8675156.25

Calculate the square root of the right side: 2945.361819879

Break this problem into two subproblems by setting 
(x + -2987.5) equal to 2945.361819879 and -2945.361819879.

Subproblem 1

x + -2987.5 = 2945.361819879 Simplifying x + -2987.5 = 2945.361819879 Reorder the terms: -2987.5 + x = 2945.361819879 Solving -2987.5 + x = 2945.361819879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2987.5' to each side of the equation. -2987.5 + 2987.5 + x = 2945.361819879 + 2987.5 Combine like terms: -2987.5 + 2987.5 = 0.0 0.0 + x = 2945.361819879 + 2987.5 x = 2945.361819879 + 2987.5 Combine like terms: 2945.361819879 + 2987.5 = 5932.861819879 x = 5932.861819879 Simplifying x = 5932.861819879

Subproblem 2

x + -2987.5 = -2945.361819879 Simplifying x + -2987.5 = -2945.361819879 Reorder the terms: -2987.5 + x = -2945.361819879 Solving -2987.5 + x = -2945.361819879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2987.5' to each side of the equation. -2987.5 + 2987.5 + x = -2945.361819879 + 2987.5 Combine like terms: -2987.5 + 2987.5 = 0.0 0.0 + x = -2945.361819879 + 2987.5 x = -2945.361819879 + 2987.5 Combine like terms: -2945.361819879 + 2987.5 = 42.138180121 x = 42.138180121 Simplifying x = 42.138180121

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5932.861819879, 42.138180121}

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