(0.2x-10)(0.2x-10)=0

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Solution for (0.2x-10)(0.2x-10)=0 equation:


Simplifying
(0.2x + -10)(0.2x + -10) = 0

Reorder the terms:
(-10 + 0.2x)(0.2x + -10) = 0

Reorder the terms:
(-10 + 0.2x)(-10 + 0.2x) = 0

Multiply (-10 + 0.2x) * (-10 + 0.2x)
(-10(-10 + 0.2x) + 0.2x * (-10 + 0.2x)) = 0
((-10 * -10 + 0.2x * -10) + 0.2x * (-10 + 0.2x)) = 0
((100 + -2x) + 0.2x * (-10 + 0.2x)) = 0
(100 + -2x + (-10 * 0.2x + 0.2x * 0.2x)) = 0
(100 + -2x + (-2x + 0.04x2)) = 0

Combine like terms: -2x + -2x = -4x
(100 + -4x + 0.04x2) = 0

Solving
100 + -4x + 0.04x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.04'.
2500 + -100x + x2 = 0

Move the constant term to the right:

Add '-2500' to each side of the equation.
2500 + -100x + -2500 + x2 = 0 + -2500

Reorder the terms:
2500 + -2500 + -100x + x2 = 0 + -2500

Combine like terms: 2500 + -2500 = 0
0 + -100x + x2 = 0 + -2500
-100x + x2 = 0 + -2500

Combine like terms: 0 + -2500 = -2500
-100x + x2 = -2500

The x term is -100x.  Take half its coefficient (-50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
-100x + 2500 + x2 = -2500 + 2500

Reorder the terms:
2500 + -100x + x2 = -2500 + 2500

Combine like terms: -2500 + 2500 = 0
2500 + -100x + x2 = 0

Factor a perfect square on the left side:
(x + -50)(x + -50) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
(x + -50) equal to 0 and 0.

Subproblem 1

x + -50 = 0 Simplifying x + -50 = 0 Reorder the terms: -50 + x = 0 Solving -50 + x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = 0 + 50 Combine like terms: -50 + 50 = 0 0 + x = 0 + 50 x = 0 + 50 Combine like terms: 0 + 50 = 50 x = 50 Simplifying x = 50

Subproblem 2

x + -50 = 0 Simplifying x + -50 = 0 Reorder the terms: -50 + x = 0 Solving -50 + x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + x = 0 + 50 Combine like terms: -50 + 50 = 0 0 + x = 0 + 50 x = 0 + 50 Combine like terms: 0 + 50 = 50 x = 50 Simplifying x = 50

Solution

The solution to the problem is based on the solutions from the subproblems. x = {50, 50}

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