.02(25-x)=x^2

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Solution for .02(25-x)=x^2 equation:


Simplifying
0.02(25 + -1x) = x2
(25 * 0.02 + -1x * 0.02) = x2
(0.5 + -0.02x) = x2

Solving
0.5 + -0.02x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
0.5 + -0.02x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-0.5 + 0.02x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 0.02x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 0.02x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 0.02x + x2 = 0 + 0.5
0.02x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
0.02x + x2 = 0.5

The x term is 0.02x.  Take half its coefficient (0.01).
Square it (0.0001) and add it to both sides.

Add '0.0001' to each side of the equation.
0.02x + 0.0001 + x2 = 0.5 + 0.0001

Reorder the terms:
0.0001 + 0.02x + x2 = 0.5 + 0.0001

Combine like terms: 0.5 + 0.0001 = 0.5001
0.0001 + 0.02x + x2 = 0.5001

Factor a perfect square on the left side:
(x + 0.01)(x + 0.01) = 0.5001

Calculate the square root of the right side: 0.707177488

Break this problem into two subproblems by setting 
(x + 0.01) equal to 0.707177488 and -0.707177488.

Subproblem 1

x + 0.01 = 0.707177488 Simplifying x + 0.01 = 0.707177488 Reorder the terms: 0.01 + x = 0.707177488 Solving 0.01 + x = 0.707177488 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.01' to each side of the equation. 0.01 + -0.01 + x = 0.707177488 + -0.01 Combine like terms: 0.01 + -0.01 = 0.00 0.00 + x = 0.707177488 + -0.01 x = 0.707177488 + -0.01 Combine like terms: 0.707177488 + -0.01 = 0.697177488 x = 0.697177488 Simplifying x = 0.697177488

Subproblem 2

x + 0.01 = -0.707177488 Simplifying x + 0.01 = -0.707177488 Reorder the terms: 0.01 + x = -0.707177488 Solving 0.01 + x = -0.707177488 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.01' to each side of the equation. 0.01 + -0.01 + x = -0.707177488 + -0.01 Combine like terms: 0.01 + -0.01 = 0.00 0.00 + x = -0.707177488 + -0.01 x = -0.707177488 + -0.01 Combine like terms: -0.707177488 + -0.01 = -0.717177488 x = -0.717177488 Simplifying x = -0.717177488

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.697177488, -0.717177488}

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