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

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


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

Reorder the terms:
4x + 5(-8 + x) = 4x(x + -5)
4x + (-8 * 5 + x * 5) = 4x(x + -5)
4x + (-40 + 5x) = 4x(x + -5)

Reorder the terms:
-40 + 4x + 5x = 4x(x + -5)

Combine like terms: 4x + 5x = 9x
-40 + 9x = 4x(x + -5)

Reorder the terms:
-40 + 9x = 4x(-5 + x)
-40 + 9x = (-5 * 4x + x * 4x)
-40 + 9x = (-20x + 4x2)

Solving
-40 + 9x = -20x + 4x2

Solving for variable 'x'.

Combine like terms: 9x + 20x = 29x
-40 + 29x + -4x2 = -20x + 4x2 + 20x + -4x2

Reorder the terms:
-40 + 29x + -4x2 = -20x + 20x + 4x2 + -4x2

Combine like terms: -20x + 20x = 0
-40 + 29x + -4x2 = 0 + 4x2 + -4x2
-40 + 29x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-40 + 29x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
10 + -7.25x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -7.25x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -7.25x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -7.25x + x2 = 0 + -10
-7.25x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-7.25x + x2 = -10

The x term is -7.25x.  Take half its coefficient (-3.625).
Square it (13.140625) and add it to both sides.

Add '13.140625' to each side of the equation.
-7.25x + 13.140625 + x2 = -10 + 13.140625

Reorder the terms:
13.140625 + -7.25x + x2 = -10 + 13.140625

Combine like terms: -10 + 13.140625 = 3.140625
13.140625 + -7.25x + x2 = 3.140625

Factor a perfect square on the left side:
(x + -3.625)(x + -3.625) = 3.140625

Calculate the square root of the right side: 1.77218086

Break this problem into two subproblems by setting 
(x + -3.625) equal to 1.77218086 and -1.77218086.

Subproblem 1

x + -3.625 = 1.77218086 Simplifying x + -3.625 = 1.77218086 Reorder the terms: -3.625 + x = 1.77218086 Solving -3.625 + x = 1.77218086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.625' to each side of the equation. -3.625 + 3.625 + x = 1.77218086 + 3.625 Combine like terms: -3.625 + 3.625 = 0.000 0.000 + x = 1.77218086 + 3.625 x = 1.77218086 + 3.625 Combine like terms: 1.77218086 + 3.625 = 5.39718086 x = 5.39718086 Simplifying x = 5.39718086

Subproblem 2

x + -3.625 = -1.77218086 Simplifying x + -3.625 = -1.77218086 Reorder the terms: -3.625 + x = -1.77218086 Solving -3.625 + x = -1.77218086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.625' to each side of the equation. -3.625 + 3.625 + x = -1.77218086 + 3.625 Combine like terms: -3.625 + 3.625 = 0.000 0.000 + x = -1.77218086 + 3.625 x = -1.77218086 + 3.625 Combine like terms: -1.77218086 + 3.625 = 1.85281914 x = 1.85281914 Simplifying x = 1.85281914

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.39718086, 1.85281914}

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