-0.01x^2+20x=4x+3000

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Solution for -0.01x^2+20x=4x+3000 equation:


Simplifying
-0.01x2 + 20x = 4x + 3000

Reorder the terms:
20x + -0.01x2 = 4x + 3000

Reorder the terms:
20x + -0.01x2 = 3000 + 4x

Solving
20x + -0.01x2 = 3000 + 4x

Solving for variable 'x'.

Reorder the terms:
-3000 + 20x + -4x + -0.01x2 = 3000 + 4x + -3000 + -4x

Combine like terms: 20x + -4x = 16x
-3000 + 16x + -0.01x2 = 3000 + 4x + -3000 + -4x

Reorder the terms:
-3000 + 16x + -0.01x2 = 3000 + -3000 + 4x + -4x

Combine like terms: 3000 + -3000 = 0
-3000 + 16x + -0.01x2 = 0 + 4x + -4x
-3000 + 16x + -0.01x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-3000 + 16x + -0.01x2 = 0

Begin completing the square.  Divide all terms by
-0.01 the coefficient of the squared term: 

Divide each side by '-0.01'.
300000 + -1600x + x2 = 0

Move the constant term to the right:

Add '-300000' to each side of the equation.
300000 + -1600x + -300000 + x2 = 0 + -300000

Reorder the terms:
300000 + -300000 + -1600x + x2 = 0 + -300000

Combine like terms: 300000 + -300000 = 0
0 + -1600x + x2 = 0 + -300000
-1600x + x2 = 0 + -300000

Combine like terms: 0 + -300000 = -300000
-1600x + x2 = -300000

The x term is -1600x.  Take half its coefficient (-800).
Square it (640000) and add it to both sides.

Add '640000' to each side of the equation.
-1600x + 640000 + x2 = -300000 + 640000

Reorder the terms:
640000 + -1600x + x2 = -300000 + 640000

Combine like terms: -300000 + 640000 = 340000
640000 + -1600x + x2 = 340000

Factor a perfect square on the left side:
(x + -800)(x + -800) = 340000

Calculate the square root of the right side: 583.095189485

Break this problem into two subproblems by setting 
(x + -800) equal to 583.095189485 and -583.095189485.

Subproblem 1

x + -800 = 583.095189485 Simplifying x + -800 = 583.095189485 Reorder the terms: -800 + x = 583.095189485 Solving -800 + x = 583.095189485 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '800' to each side of the equation. -800 + 800 + x = 583.095189485 + 800 Combine like terms: -800 + 800 = 0 0 + x = 583.095189485 + 800 x = 583.095189485 + 800 Combine like terms: 583.095189485 + 800 = 1383.095189485 x = 1383.095189485 Simplifying x = 1383.095189485

Subproblem 2

x + -800 = -583.095189485 Simplifying x + -800 = -583.095189485 Reorder the terms: -800 + x = -583.095189485 Solving -800 + x = -583.095189485 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '800' to each side of the equation. -800 + 800 + x = -583.095189485 + 800 Combine like terms: -800 + 800 = 0 0 + x = -583.095189485 + 800 x = -583.095189485 + 800 Combine like terms: -583.095189485 + 800 = 216.904810515 x = 216.904810515 Simplifying x = 216.904810515

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1383.095189485, 216.904810515}

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