0.01x(5-0.2x)=0.75+0.198x

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Solution for 0.01x(5-0.2x)=0.75+0.198x equation:


Simplifying
0.01x(5 + -0.2x) = 0.75 + 0.198x
(5 * 0.01x + -0.2x * 0.01x) = 0.75 + 0.198x
(0.05x + -0.002x2) = 0.75 + 0.198x

Solving
0.05x + -0.002x2 = 0.75 + 0.198x

Solving for variable 'x'.

Reorder the terms:
-0.75 + 0.05x + -0.198x + -0.002x2 = 0.75 + 0.198x + -0.75 + -0.198x

Combine like terms: 0.05x + -0.198x = -0.148x
-0.75 + -0.148x + -0.002x2 = 0.75 + 0.198x + -0.75 + -0.198x

Reorder the terms:
-0.75 + -0.148x + -0.002x2 = 0.75 + -0.75 + 0.198x + -0.198x

Combine like terms: 0.75 + -0.75 = 0.00
-0.75 + -0.148x + -0.002x2 = 0.00 + 0.198x + -0.198x
-0.75 + -0.148x + -0.002x2 = 0.198x + -0.198x

Combine like terms: 0.198x + -0.198x = 0.000
-0.75 + -0.148x + -0.002x2 = 0.000

Begin completing the square.  Divide all terms by
-0.002 the coefficient of the squared term: 

Divide each side by '-0.002'.
375 + 74x + x2 = 0

Move the constant term to the right:

Add '-375' to each side of the equation.
375 + 74x + -375 + x2 = 0 + -375

Reorder the terms:
375 + -375 + 74x + x2 = 0 + -375

Combine like terms: 375 + -375 = 0
0 + 74x + x2 = 0 + -375
74x + x2 = 0 + -375

Combine like terms: 0 + -375 = -375
74x + x2 = -375

The x term is 74x.  Take half its coefficient (37).
Square it (1369) and add it to both sides.

Add '1369' to each side of the equation.
74x + 1369 + x2 = -375 + 1369

Reorder the terms:
1369 + 74x + x2 = -375 + 1369

Combine like terms: -375 + 1369 = 994
1369 + 74x + x2 = 994

Factor a perfect square on the left side:
(x + 37)(x + 37) = 994

Calculate the square root of the right side: 31.527765541

Break this problem into two subproblems by setting 
(x + 37) equal to 31.527765541 and -31.527765541.

Subproblem 1

x + 37 = 31.527765541 Simplifying x + 37 = 31.527765541 Reorder the terms: 37 + x = 31.527765541 Solving 37 + x = 31.527765541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-37' to each side of the equation. 37 + -37 + x = 31.527765541 + -37 Combine like terms: 37 + -37 = 0 0 + x = 31.527765541 + -37 x = 31.527765541 + -37 Combine like terms: 31.527765541 + -37 = -5.472234459 x = -5.472234459 Simplifying x = -5.472234459

Subproblem 2

x + 37 = -31.527765541 Simplifying x + 37 = -31.527765541 Reorder the terms: 37 + x = -31.527765541 Solving 37 + x = -31.527765541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-37' to each side of the equation. 37 + -37 + x = -31.527765541 + -37 Combine like terms: 37 + -37 = 0 0 + x = -31.527765541 + -37 x = -31.527765541 + -37 Combine like terms: -31.527765541 + -37 = -68.527765541 x = -68.527765541 Simplifying x = -68.527765541

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-5.472234459, -68.527765541}

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