x(5-x).2=-1-4-1

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Solution for x(5-x).2=-1-4-1 equation:


Simplifying
x(5 + -1x) * 0.2 = -1 + -4 + -1

Reorder the terms for easier multiplication:
0.2x(5 + -1x) = -1 + -4 + -1
(5 * 0.2x + -1x * 0.2x) = -1 + -4 + -1
(1x + -0.2x2) = -1 + -4 + -1

Combine like terms: -1 + -4 = -5
1x + -0.2x2 = -5 + -1

Combine like terms: -5 + -1 = -6
1x + -0.2x2 = -6

Solving
1x + -0.2x2 = -6

Solving for variable 'x'.

Reorder the terms:
6 + 1x + -0.2x2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + 1x + -0.2x2 = 0

Begin completing the square.  Divide all terms by
-0.2 the coefficient of the squared term: 

Divide each side by '-0.2'.
-30 + -5x + x2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -5x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + -5x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -5x + x2 = 0 + 30
-5x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
-5x + x2 = 30

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 30 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 30 + 6.25

Combine like terms: 30 + 6.25 = 36.25
6.25 + -5x + x2 = 36.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 36.25

Calculate the square root of the right side: 6.020797289

Break this problem into two subproblems by setting 
(x + -2.5) equal to 6.020797289 and -6.020797289.

Subproblem 1

x + -2.5 = 6.020797289 Simplifying x + -2.5 = 6.020797289 Reorder the terms: -2.5 + x = 6.020797289 Solving -2.5 + x = 6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 6.020797289 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 6.020797289 + 2.5 x = 6.020797289 + 2.5 Combine like terms: 6.020797289 + 2.5 = 8.520797289 x = 8.520797289 Simplifying x = 8.520797289

Subproblem 2

x + -2.5 = -6.020797289 Simplifying x + -2.5 = -6.020797289 Reorder the terms: -2.5 + x = -6.020797289 Solving -2.5 + x = -6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -6.020797289 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -6.020797289 + 2.5 x = -6.020797289 + 2.5 Combine like terms: -6.020797289 + 2.5 = -3.520797289 x = -3.520797289 Simplifying x = -3.520797289

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.520797289, -3.520797289}

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