36.5=0.04x^2-x

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Solution for 36.5=0.04x^2-x equation:


Simplifying
36.5 = 0.04x2 + -1x

Reorder the terms:
36.5 = -1x + 0.04x2

Solving
36.5 = -1x + 0.04x2

Solving for variable 'x'.

Reorder the terms:
36.5 + x + -0.04x2 = -1x + x + 0.04x2 + -0.04x2

Combine like terms: -1x + x = 0
36.5 + x + -0.04x2 = 0 + 0.04x2 + -0.04x2
36.5 + x + -0.04x2 = 0.04x2 + -0.04x2

Combine like terms: 0.04x2 + -0.04x2 = 0.00
36.5 + x + -0.04x2 = 0.00

Begin completing the square.  Divide all terms by
-0.04 the coefficient of the squared term: 

Divide each side by '-0.04'.
-912.5 + -25x + x2 = 0

Move the constant term to the right:

Add '912.5' to each side of the equation.
-912.5 + -25x + 912.5 + x2 = 0 + 912.5

Reorder the terms:
-912.5 + 912.5 + -25x + x2 = 0 + 912.5

Combine like terms: -912.5 + 912.5 = 0.0
0.0 + -25x + x2 = 0 + 912.5
-25x + x2 = 0 + 912.5

Combine like terms: 0 + 912.5 = 912.5
-25x + x2 = 912.5

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.
-25x + 0.25 + x2 = 912.5 + 0.25

Reorder the terms:
0.25 + -25x + x2 = 912.5 + 0.25

Combine like terms: 912.5 + 0.25 = 912.75
0.25 + -25x + x2 = 912.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 912.75

Calculate the square root of the right side: 30.21175268

Break this problem into two subproblems by setting 
(x + 0.5) equal to 30.21175268 and -30.21175268.

Subproblem 1

x + 0.5 = 30.21175268 Simplifying x + 0.5 = 30.21175268 Reorder the terms: 0.5 + x = 30.21175268 Solving 0.5 + x = 30.21175268 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 = 30.21175268 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 30.21175268 + -0.5 x = 30.21175268 + -0.5 Combine like terms: 30.21175268 + -0.5 = 29.71175268 x = 29.71175268 Simplifying x = 29.71175268

Subproblem 2

x + 0.5 = -30.21175268 Simplifying x + 0.5 = -30.21175268 Reorder the terms: 0.5 + x = -30.21175268 Solving 0.5 + x = -30.21175268 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 = -30.21175268 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -30.21175268 + -0.5 x = -30.21175268 + -0.5 Combine like terms: -30.21175268 + -0.5 = -30.71175268 x = -30.71175268 Simplifying x = -30.71175268

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.71175268, -30.71175268}

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