(0.2-x)(0.3-x)=0.25x^2

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Solution for (0.2-x)(0.3-x)=0.25x^2 equation:


Simplifying
(0.2 + -1x)(0.3 + -1x) = 0.25x2

Multiply (0.2 + -1x) * (0.3 + -1x)
(0.2(0.3 + -1x) + -1x * (0.3 + -1x)) = 0.25x2
((0.3 * 0.2 + -1x * 0.2) + -1x * (0.3 + -1x)) = 0.25x2
((0.06 + -0.2x) + -1x * (0.3 + -1x)) = 0.25x2
(0.06 + -0.2x + (0.3 * -1x + -1x * -1x)) = 0.25x2
(0.06 + -0.2x + (-0.3x + 1x2)) = 0.25x2

Combine like terms: -0.2x + -0.3x = -0.5x
(0.06 + -0.5x + 1x2) = 0.25x2

Solving
0.06 + -0.5x + 1x2 = 0.25x2

Solving for variable 'x'.

Combine like terms: 1x2 + -0.25x2 = 0.75x2
0.06 + -0.5x + 0.75x2 = 0.25x2 + -0.25x2

Combine like terms: 0.25x2 + -0.25x2 = 0.00
0.06 + -0.5x + 0.75x2 = 0.00

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

Divide each side by '0.75'.
0.08 + -0.6666666667x + x2 = 0

Move the constant term to the right:

Add '-0.08' to each side of the equation.
0.08 + -0.6666666667x + -0.08 + x2 = 0 + -0.08

Reorder the terms:
0.08 + -0.08 + -0.6666666667x + x2 = 0 + -0.08

Combine like terms: 0.08 + -0.08 = 0.00
0.00 + -0.6666666667x + x2 = 0 + -0.08
-0.6666666667x + x2 = 0 + -0.08

Combine like terms: 0 + -0.08 = -0.08
-0.6666666667x + x2 = -0.08

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = -0.08 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = -0.08 + 0.1111111112

Combine like terms: -0.08 + 0.1111111112 = 0.0311111112
0.1111111112 + -0.6666666667x + x2 = 0.0311111112

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 0.0311111112

Calculate the square root of the right side: 0.176383421

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 0.176383421 and -0.176383421.

Subproblem 1

x + -0.3333333334 = 0.176383421 Simplifying x + -0.3333333334 = 0.176383421 Reorder the terms: -0.3333333334 + x = 0.176383421 Solving -0.3333333334 + x = 0.176383421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 0.176383421 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 0.176383421 + 0.3333333334 x = 0.176383421 + 0.3333333334 Combine like terms: 0.176383421 + 0.3333333334 = 0.5097167544 x = 0.5097167544 Simplifying x = 0.5097167544

Subproblem 2

x + -0.3333333334 = -0.176383421 Simplifying x + -0.3333333334 = -0.176383421 Reorder the terms: -0.3333333334 + x = -0.176383421 Solving -0.3333333334 + x = -0.176383421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -0.176383421 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -0.176383421 + 0.3333333334 x = -0.176383421 + 0.3333333334 Combine like terms: -0.176383421 + 0.3333333334 = 0.1569499124 x = 0.1569499124 Simplifying x = 0.1569499124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5097167544, 0.1569499124}

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