100=.05x^2+.05x

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Solution for 100=.05x^2+.05x equation:


Simplifying
100 = 0.05x2 + 0.05x

Reorder the terms:
100 = 0.05x + 0.05x2

Solving
100 = 0.05x + 0.05x2

Solving for variable 'x'.

Reorder the terms:
100 + -0.05x + -0.05x2 = 0.05x + -0.05x + 0.05x2 + -0.05x2

Combine like terms: 0.05x + -0.05x = 0.00
100 + -0.05x + -0.05x2 = 0.00 + 0.05x2 + -0.05x2
100 + -0.05x + -0.05x2 = 0.05x2 + -0.05x2

Combine like terms: 0.05x2 + -0.05x2 = 0.00
100 + -0.05x + -0.05x2 = 0.00

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
-2000 + x + x2 = 0

Move the constant term to the right:

Add '2000' to each side of the equation.
-2000 + x + 2000 + x2 = 0 + 2000

Reorder the terms:
-2000 + 2000 + x + x2 = 0 + 2000

Combine like terms: -2000 + 2000 = 0
0 + x + x2 = 0 + 2000
x + x2 = 0 + 2000

Combine like terms: 0 + 2000 = 2000
x + x2 = 2000

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 2000 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 2000 + 0.25

Combine like terms: 2000 + 0.25 = 2000.25
1.25 + x2 = 2000.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 2000.25

Calculate the square root of the right side: 44.724154548

Break this problem into two subproblems by setting 
(x + 0.5) equal to 44.724154548 and -44.724154548.

Subproblem 1

x + 0.5 = 44.724154548 Simplifying x + 0.5 = 44.724154548 Reorder the terms: 0.5 + x = 44.724154548 Solving 0.5 + x = 44.724154548 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 44.724154548 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 44.724154548 + -0.5 x = 44.724154548 + -0.5 Combine like terms: 44.724154548 + -0.5 = 44.224154548 x = 44.224154548 Simplifying x = 44.224154548

Subproblem 2

x + 0.5 = -44.724154548 Simplifying x + 0.5 = -44.724154548 Reorder the terms: 0.5 + x = -44.724154548 Solving 0.5 + x = -44.724154548 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -44.724154548 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -44.724154548 + -0.5 x = -44.724154548 + -0.5 Combine like terms: -44.724154548 + -0.5 = -45.224154548 x = -45.224154548 Simplifying x = -45.224154548

Solution

The solution to the problem is based on the solutions from the subproblems. x = {44.224154548, -45.224154548}

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