54.3(.5-x)(.4-x)=0

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Solution for 54.3(.5-x)(.4-x)=0 equation:


Simplifying
54.3(0.5 + -1x)(0.4 + -1x) = 0

Multiply (0.5 + -1x) * (0.4 + -1x)
54.3(0.5(0.4 + -1x) + -1x * (0.4 + -1x)) = 0
54.3((0.4 * 0.5 + -1x * 0.5) + -1x * (0.4 + -1x)) = 0
54.3((0.2 + -0.5x) + -1x * (0.4 + -1x)) = 0
54.3(0.2 + -0.5x + (0.4 * -1x + -1x * -1x)) = 0
54.3(0.2 + -0.5x + (-0.4x + 1x2)) = 0

Combine like terms: -0.5x + -0.4x = -0.9x
54.3(0.2 + -0.9x + 1x2) = 0
(0.2 * 54.3 + -0.9x * 54.3 + 1x2 * 54.3) = 0
(10.86 + -48.87x + 54.3x2) = 0

Solving
10.86 + -48.87x + 54.3x2 = 0

Solving for variable 'x'.

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

Divide each side by '54.3'.
0.2 + -0.9x + x2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -0.9x + -0.2 + x2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -0.9x + x2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -0.9x + x2 = 0 + -0.2
-0.9x + x2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-0.9x + x2 = -0.2

The x term is -0.9x.  Take half its coefficient (-0.45).
Square it (0.2025) and add it to both sides.

Add '0.2025' to each side of the equation.
-0.9x + 0.2025 + x2 = -0.2 + 0.2025

Reorder the terms:
0.2025 + -0.9x + x2 = -0.2 + 0.2025

Combine like terms: -0.2 + 0.2025 = 0.0025
0.2025 + -0.9x + x2 = 0.0025

Factor a perfect square on the left side:
(x + -0.45)(x + -0.45) = 0.0025

Calculate the square root of the right side: 0.05

Break this problem into two subproblems by setting 
(x + -0.45) equal to 0.05 and -0.05.

Subproblem 1

x + -0.45 = 0.05 Simplifying x + -0.45 = 0.05 Reorder the terms: -0.45 + x = 0.05 Solving -0.45 + x = 0.05 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + x = 0.05 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + x = 0.05 + 0.45 x = 0.05 + 0.45 Combine like terms: 0.05 + 0.45 = 0.5 x = 0.5 Simplifying x = 0.5

Subproblem 2

x + -0.45 = -0.05 Simplifying x + -0.45 = -0.05 Reorder the terms: -0.45 + x = -0.05 Solving -0.45 + x = -0.05 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + x = -0.05 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + x = -0.05 + 0.45 x = -0.05 + 0.45 Combine like terms: -0.05 + 0.45 = 0.4 x = 0.4 Simplifying x = 0.4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5, 0.4}

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