0=-.004x^2+12x-1500

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Solution for 0=-.004x^2+12x-1500 equation:


Simplifying
0 = -0.004x2 + 12x + -1500

Reorder the terms:
0 = -1500 + 12x + -0.004x2

Solving
0 = -1500 + 12x + -0.004x2

Solving for variable 'x'.

Combine like terms: 0 + 1500 = 1500
1500 + -12x + 0.004x2 = -1500 + 12x + -0.004x2 + 1500 + -12x + 0.004x2

Reorder the terms:
1500 + -12x + 0.004x2 = -1500 + 1500 + 12x + -12x + -0.004x2 + 0.004x2

Combine like terms: -1500 + 1500 = 0
1500 + -12x + 0.004x2 = 0 + 12x + -12x + -0.004x2 + 0.004x2
1500 + -12x + 0.004x2 = 12x + -12x + -0.004x2 + 0.004x2

Combine like terms: 12x + -12x = 0
1500 + -12x + 0.004x2 = 0 + -0.004x2 + 0.004x2
1500 + -12x + 0.004x2 = -0.004x2 + 0.004x2

Combine like terms: -0.004x2 + 0.004x2 = 0.000
1500 + -12x + 0.004x2 = 0.000

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

Divide each side by '0.004'.
375000 + -3000x + x2 = 0

Move the constant term to the right:

Add '-375000' to each side of the equation.
375000 + -3000x + -375000 + x2 = 0 + -375000

Reorder the terms:
375000 + -375000 + -3000x + x2 = 0 + -375000

Combine like terms: 375000 + -375000 = 0
0 + -3000x + x2 = 0 + -375000
-3000x + x2 = 0 + -375000

Combine like terms: 0 + -375000 = -375000
-3000x + x2 = -375000

The x term is -3000x.  Take half its coefficient (-1500).
Square it (2250000) and add it to both sides.

Add '2250000' to each side of the equation.
-3000x + 2250000 + x2 = -375000 + 2250000

Reorder the terms:
2250000 + -3000x + x2 = -375000 + 2250000

Combine like terms: -375000 + 2250000 = 1875000
2250000 + -3000x + x2 = 1875000

Factor a perfect square on the left side:
(x + -1500)(x + -1500) = 1875000

Calculate the square root of the right side: 1369.306393763

Break this problem into two subproblems by setting 
(x + -1500) equal to 1369.306393763 and -1369.306393763.

Subproblem 1

x + -1500 = 1369.306393763 Simplifying x + -1500 = 1369.306393763 Reorder the terms: -1500 + x = 1369.306393763 Solving -1500 + x = 1369.306393763 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1500' to each side of the equation. -1500 + 1500 + x = 1369.306393763 + 1500 Combine like terms: -1500 + 1500 = 0 0 + x = 1369.306393763 + 1500 x = 1369.306393763 + 1500 Combine like terms: 1369.306393763 + 1500 = 2869.306393763 x = 2869.306393763 Simplifying x = 2869.306393763

Subproblem 2

x + -1500 = -1369.306393763 Simplifying x + -1500 = -1369.306393763 Reorder the terms: -1500 + x = -1369.306393763 Solving -1500 + x = -1369.306393763 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1500' to each side of the equation. -1500 + 1500 + x = -1369.306393763 + 1500 Combine like terms: -1500 + 1500 = 0 0 + x = -1369.306393763 + 1500 x = -1369.306393763 + 1500 Combine like terms: -1369.306393763 + 1500 = 130.693606237 x = 130.693606237 Simplifying x = 130.693606237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2869.306393763, 130.693606237}

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