1.8x-0.001x^2=0.3x+60

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Solution for 1.8x-0.001x^2=0.3x+60 equation:


Simplifying
1.8x + -0.001x2 = 0.3x + 60

Reorder the terms:
1.8x + -0.001x2 = 60 + 0.3x

Solving
1.8x + -0.001x2 = 60 + 0.3x

Solving for variable 'x'.

Reorder the terms:
-60 + 1.8x + -0.3x + -0.001x2 = 60 + 0.3x + -60 + -0.3x

Combine like terms: 1.8x + -0.3x = 1.5x
-60 + 1.5x + -0.001x2 = 60 + 0.3x + -60 + -0.3x

Reorder the terms:
-60 + 1.5x + -0.001x2 = 60 + -60 + 0.3x + -0.3x

Combine like terms: 60 + -60 = 0
-60 + 1.5x + -0.001x2 = 0 + 0.3x + -0.3x
-60 + 1.5x + -0.001x2 = 0.3x + -0.3x

Combine like terms: 0.3x + -0.3x = 0.0
-60 + 1.5x + -0.001x2 = 0.0

Begin completing the square.  Divide all terms by
-0.001 the coefficient of the squared term: 

Divide each side by '-0.001'.
60000 + -1500x + x2 = 0

Move the constant term to the right:

Add '-60000' to each side of the equation.
60000 + -1500x + -60000 + x2 = 0 + -60000

Reorder the terms:
60000 + -60000 + -1500x + x2 = 0 + -60000

Combine like terms: 60000 + -60000 = 0
0 + -1500x + x2 = 0 + -60000
-1500x + x2 = 0 + -60000

Combine like terms: 0 + -60000 = -60000
-1500x + x2 = -60000

The x term is -1500x.  Take half its coefficient (-750).
Square it (562500) and add it to both sides.

Add '562500' to each side of the equation.
-1500x + 562500 + x2 = -60000 + 562500

Reorder the terms:
562500 + -1500x + x2 = -60000 + 562500

Combine like terms: -60000 + 562500 = 502500
562500 + -1500x + x2 = 502500

Factor a perfect square on the left side:
(x + -750)(x + -750) = 502500

Calculate the square root of the right side: 708.872343938

Break this problem into two subproblems by setting 
(x + -750) equal to 708.872343938 and -708.872343938.

Subproblem 1

x + -750 = 708.872343938 Simplifying x + -750 = 708.872343938 Reorder the terms: -750 + x = 708.872343938 Solving -750 + x = 708.872343938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '750' to each side of the equation. -750 + 750 + x = 708.872343938 + 750 Combine like terms: -750 + 750 = 0 0 + x = 708.872343938 + 750 x = 708.872343938 + 750 Combine like terms: 708.872343938 + 750 = 1458.872343938 x = 1458.872343938 Simplifying x = 1458.872343938

Subproblem 2

x + -750 = -708.872343938 Simplifying x + -750 = -708.872343938 Reorder the terms: -750 + x = -708.872343938 Solving -750 + x = -708.872343938 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '750' to each side of the equation. -750 + 750 + x = -708.872343938 + 750 Combine like terms: -750 + 750 = 0 0 + x = -708.872343938 + 750 x = -708.872343938 + 750 Combine like terms: -708.872343938 + 750 = 41.127656062 x = 41.127656062 Simplifying x = 41.127656062

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1458.872343938, 41.127656062}

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