27-4x=-5x(4x+5)-5(-8-3x)

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Solution for 27-4x=-5x(4x+5)-5(-8-3x) equation:


Simplifying
27 + -4x = -5x(4x + 5) + -5(-8 + -3x)

Reorder the terms:
27 + -4x = -5x(5 + 4x) + -5(-8 + -3x)
27 + -4x = (5 * -5x + 4x * -5x) + -5(-8 + -3x)
27 + -4x = (-25x + -20x2) + -5(-8 + -3x)
27 + -4x = -25x + -20x2 + (-8 * -5 + -3x * -5)
27 + -4x = -25x + -20x2 + (40 + 15x)

Reorder the terms:
27 + -4x = 40 + -25x + 15x + -20x2

Combine like terms: -25x + 15x = -10x
27 + -4x = 40 + -10x + -20x2

Solving
27 + -4x = 40 + -10x + -20x2

Solving for variable 'x'.

Reorder the terms:
27 + -40 + -4x + 10x + 20x2 = 40 + -10x + -20x2 + -40 + 10x + 20x2

Combine like terms: 27 + -40 = -13
-13 + -4x + 10x + 20x2 = 40 + -10x + -20x2 + -40 + 10x + 20x2

Combine like terms: -4x + 10x = 6x
-13 + 6x + 20x2 = 40 + -10x + -20x2 + -40 + 10x + 20x2

Reorder the terms:
-13 + 6x + 20x2 = 40 + -40 + -10x + 10x + -20x2 + 20x2

Combine like terms: 40 + -40 = 0
-13 + 6x + 20x2 = 0 + -10x + 10x + -20x2 + 20x2
-13 + 6x + 20x2 = -10x + 10x + -20x2 + 20x2

Combine like terms: -10x + 10x = 0
-13 + 6x + 20x2 = 0 + -20x2 + 20x2
-13 + 6x + 20x2 = -20x2 + 20x2

Combine like terms: -20x2 + 20x2 = 0
-13 + 6x + 20x2 = 0

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

Divide each side by '20'.
-0.65 + 0.3x + x2 = 0

Move the constant term to the right:

Add '0.65' to each side of the equation.
-0.65 + 0.3x + 0.65 + x2 = 0 + 0.65

Reorder the terms:
-0.65 + 0.65 + 0.3x + x2 = 0 + 0.65

Combine like terms: -0.65 + 0.65 = 0.00
0.00 + 0.3x + x2 = 0 + 0.65
0.3x + x2 = 0 + 0.65

Combine like terms: 0 + 0.65 = 0.65
0.3x + x2 = 0.65

The x term is 0.3x.  Take half its coefficient (0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
0.3x + 0.0225 + x2 = 0.65 + 0.0225

Reorder the terms:
0.0225 + 0.3x + x2 = 0.65 + 0.0225

Combine like terms: 0.65 + 0.0225 = 0.6725
0.0225 + 0.3x + x2 = 0.6725

Factor a perfect square on the left side:
(x + 0.15)(x + 0.15) = 0.6725

Calculate the square root of the right side: 0.820060973

Break this problem into two subproblems by setting 
(x + 0.15) equal to 0.820060973 and -0.820060973.

Subproblem 1

x + 0.15 = 0.820060973 Simplifying x + 0.15 = 0.820060973 Reorder the terms: 0.15 + x = 0.820060973 Solving 0.15 + x = 0.820060973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = 0.820060973 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = 0.820060973 + -0.15 x = 0.820060973 + -0.15 Combine like terms: 0.820060973 + -0.15 = 0.670060973 x = 0.670060973 Simplifying x = 0.670060973

Subproblem 2

x + 0.15 = -0.820060973 Simplifying x + 0.15 = -0.820060973 Reorder the terms: 0.15 + x = -0.820060973 Solving 0.15 + x = -0.820060973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = -0.820060973 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = -0.820060973 + -0.15 x = -0.820060973 + -0.15 Combine like terms: -0.820060973 + -0.15 = -0.970060973 x = -0.970060973 Simplifying x = -0.970060973

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.670060973, -0.970060973}

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