12500=.5x^2+11x+4000

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Solution for 12500=.5x^2+11x+4000 equation:


Simplifying
12500 = 0.5x2 + 11x + 4000

Reorder the terms:
12500 = 4000 + 11x + 0.5x2

Solving
12500 = 4000 + 11x + 0.5x2

Solving for variable 'x'.

Combine like terms: 12500 + -4000 = 8500
8500 + -11x + -0.5x2 = 4000 + 11x + 0.5x2 + -4000 + -11x + -0.5x2

Reorder the terms:
8500 + -11x + -0.5x2 = 4000 + -4000 + 11x + -11x + 0.5x2 + -0.5x2

Combine like terms: 4000 + -4000 = 0
8500 + -11x + -0.5x2 = 0 + 11x + -11x + 0.5x2 + -0.5x2
8500 + -11x + -0.5x2 = 11x + -11x + 0.5x2 + -0.5x2

Combine like terms: 11x + -11x = 0
8500 + -11x + -0.5x2 = 0 + 0.5x2 + -0.5x2
8500 + -11x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
8500 + -11x + -0.5x2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-17000 + 22x + x2 = 0

Move the constant term to the right:

Add '17000' to each side of the equation.
-17000 + 22x + 17000 + x2 = 0 + 17000

Reorder the terms:
-17000 + 17000 + 22x + x2 = 0 + 17000

Combine like terms: -17000 + 17000 = 0
0 + 22x + x2 = 0 + 17000
22x + x2 = 0 + 17000

Combine like terms: 0 + 17000 = 17000
22x + x2 = 17000

The x term is 22x.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22x + 121 + x2 = 17000 + 121

Reorder the terms:
121 + 22x + x2 = 17000 + 121

Combine like terms: 17000 + 121 = 17121
121 + 22x + x2 = 17121

Factor a perfect square on the left side:
(x + 11)(x + 11) = 17121

Calculate the square root of the right side: 130.847239176

Break this problem into two subproblems by setting 
(x + 11) equal to 130.847239176 and -130.847239176.

Subproblem 1

x + 11 = 130.847239176 Simplifying x + 11 = 130.847239176 Reorder the terms: 11 + x = 130.847239176 Solving 11 + x = 130.847239176 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 130.847239176 + -11 Combine like terms: 11 + -11 = 0 0 + x = 130.847239176 + -11 x = 130.847239176 + -11 Combine like terms: 130.847239176 + -11 = 119.847239176 x = 119.847239176 Simplifying x = 119.847239176

Subproblem 2

x + 11 = -130.847239176 Simplifying x + 11 = -130.847239176 Reorder the terms: 11 + x = -130.847239176 Solving 11 + x = -130.847239176 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = -130.847239176 + -11 Combine like terms: 11 + -11 = 0 0 + x = -130.847239176 + -11 x = -130.847239176 + -11 Combine like terms: -130.847239176 + -11 = -141.847239176 x = -141.847239176 Simplifying x = -141.847239176

Solution

The solution to the problem is based on the solutions from the subproblems. x = {119.847239176, -141.847239176}

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