x=1500+220x-5x^2

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Solution for x=1500+220x-5x^2 equation:


Simplifying
x = 1500 + 220x + -5x2

Solving
x = 1500 + 220x + -5x2

Solving for variable 'x'.

Reorder the terms:
-1500 + x + -220x + 5x2 = 1500 + 220x + -5x2 + -1500 + -220x + 5x2

Combine like terms: x + -220x = -219x
-1500 + -219x + 5x2 = 1500 + 220x + -5x2 + -1500 + -220x + 5x2

Reorder the terms:
-1500 + -219x + 5x2 = 1500 + -1500 + 220x + -220x + -5x2 + 5x2

Combine like terms: 1500 + -1500 = 0
-1500 + -219x + 5x2 = 0 + 220x + -220x + -5x2 + 5x2
-1500 + -219x + 5x2 = 220x + -220x + -5x2 + 5x2

Combine like terms: 220x + -220x = 0
-1500 + -219x + 5x2 = 0 + -5x2 + 5x2
-1500 + -219x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-1500 + -219x + 5x2 = 0

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

Divide each side by '5'.
-300 + -43.8x + x2 = 0

Move the constant term to the right:

Add '300' to each side of the equation.
-300 + -43.8x + 300 + x2 = 0 + 300

Reorder the terms:
-300 + 300 + -43.8x + x2 = 0 + 300

Combine like terms: -300 + 300 = 0
0 + -43.8x + x2 = 0 + 300
-43.8x + x2 = 0 + 300

Combine like terms: 0 + 300 = 300
-43.8x + x2 = 300

The x term is -43.8x.  Take half its coefficient (-21.9).
Square it (479.61) and add it to both sides.

Add '479.61' to each side of the equation.
-43.8x + 479.61 + x2 = 300 + 479.61

Reorder the terms:
479.61 + -43.8x + x2 = 300 + 479.61

Combine like terms: 300 + 479.61 = 779.61
479.61 + -43.8x + x2 = 779.61

Factor a perfect square on the left side:
(x + -21.9)(x + -21.9) = 779.61

Calculate the square root of the right side: 27.921497095

Break this problem into two subproblems by setting 
(x + -21.9) equal to 27.921497095 and -27.921497095.

Subproblem 1

x + -21.9 = 27.921497095 Simplifying x + -21.9 = 27.921497095 Reorder the terms: -21.9 + x = 27.921497095 Solving -21.9 + x = 27.921497095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21.9' to each side of the equation. -21.9 + 21.9 + x = 27.921497095 + 21.9 Combine like terms: -21.9 + 21.9 = 0.0 0.0 + x = 27.921497095 + 21.9 x = 27.921497095 + 21.9 Combine like terms: 27.921497095 + 21.9 = 49.821497095 x = 49.821497095 Simplifying x = 49.821497095

Subproblem 2

x + -21.9 = -27.921497095 Simplifying x + -21.9 = -27.921497095 Reorder the terms: -21.9 + x = -27.921497095 Solving -21.9 + x = -27.921497095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21.9' to each side of the equation. -21.9 + 21.9 + x = -27.921497095 + 21.9 Combine like terms: -21.9 + 21.9 = 0.0 0.0 + x = -27.921497095 + 21.9 x = -27.921497095 + 21.9 Combine like terms: -27.921497095 + 21.9 = -6.021497095 x = -6.021497095 Simplifying x = -6.021497095

Solution

The solution to the problem is based on the solutions from the subproblems. x = {49.821497095, -6.021497095}

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