75x=3000+.2x^2

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Solution for 75x=3000+.2x^2 equation:


Simplifying
75x = 3000 + 0.2x2

Solving
75x = 3000 + 0.2x2

Solving for variable 'x'.

Reorder the terms:
-3000 + 75x + -0.2x2 = 3000 + 0.2x2 + -3000 + -0.2x2

Reorder the terms:
-3000 + 75x + -0.2x2 = 3000 + -3000 + 0.2x2 + -0.2x2

Combine like terms: 3000 + -3000 = 0
-3000 + 75x + -0.2x2 = 0 + 0.2x2 + -0.2x2
-3000 + 75x + -0.2x2 = 0.2x2 + -0.2x2

Combine like terms: 0.2x2 + -0.2x2 = 0.0
-3000 + 75x + -0.2x2 = 0.0

Begin completing the square.  Divide all terms by
-0.2 the coefficient of the squared term: 

Divide each side by '-0.2'.
15000 + -375x + x2 = 0

Move the constant term to the right:

Add '-15000' to each side of the equation.
15000 + -375x + -15000 + x2 = 0 + -15000

Reorder the terms:
15000 + -15000 + -375x + x2 = 0 + -15000

Combine like terms: 15000 + -15000 = 0
0 + -375x + x2 = 0 + -15000
-375x + x2 = 0 + -15000

Combine like terms: 0 + -15000 = -15000
-375x + x2 = -15000

The x term is -375x.  Take half its coefficient (-187.5).
Square it (35156.25) and add it to both sides.

Add '35156.25' to each side of the equation.
-375x + 35156.25 + x2 = -15000 + 35156.25

Reorder the terms:
35156.25 + -375x + x2 = -15000 + 35156.25

Combine like terms: -15000 + 35156.25 = 20156.25
35156.25 + -375x + x2 = 20156.25

Factor a perfect square on the left side:
(x + -187.5)(x + -187.5) = 20156.25

Calculate the square root of the right side: 141.972708645

Break this problem into two subproblems by setting 
(x + -187.5) equal to 141.972708645 and -141.972708645.

Subproblem 1

x + -187.5 = 141.972708645 Simplifying x + -187.5 = 141.972708645 Reorder the terms: -187.5 + x = 141.972708645 Solving -187.5 + x = 141.972708645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '187.5' to each side of the equation. -187.5 + 187.5 + x = 141.972708645 + 187.5 Combine like terms: -187.5 + 187.5 = 0.0 0.0 + x = 141.972708645 + 187.5 x = 141.972708645 + 187.5 Combine like terms: 141.972708645 + 187.5 = 329.472708645 x = 329.472708645 Simplifying x = 329.472708645

Subproblem 2

x + -187.5 = -141.972708645 Simplifying x + -187.5 = -141.972708645 Reorder the terms: -187.5 + x = -141.972708645 Solving -187.5 + x = -141.972708645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '187.5' to each side of the equation. -187.5 + 187.5 + x = -141.972708645 + 187.5 Combine like terms: -187.5 + 187.5 = 0.0 0.0 + x = -141.972708645 + 187.5 x = -141.972708645 + 187.5 Combine like terms: -141.972708645 + 187.5 = 45.527291355 x = 45.527291355 Simplifying x = 45.527291355

Solution

The solution to the problem is based on the solutions from the subproblems. x = {329.472708645, 45.527291355}

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