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

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


Simplifying
(4x + -2)(5x + -5) = x

Reorder the terms:
(-2 + 4x)(5x + -5) = x

Reorder the terms:
(-2 + 4x)(-5 + 5x) = x

Multiply (-2 + 4x) * (-5 + 5x)
(-2(-5 + 5x) + 4x * (-5 + 5x)) = x
((-5 * -2 + 5x * -2) + 4x * (-5 + 5x)) = x
((10 + -10x) + 4x * (-5 + 5x)) = x
(10 + -10x + (-5 * 4x + 5x * 4x)) = x
(10 + -10x + (-20x + 20x2)) = x

Combine like terms: -10x + -20x = -30x
(10 + -30x + 20x2) = x

Solving
10 + -30x + 20x2 = x

Solving for variable 'x'.

Reorder the terms:
10 + -30x + -1x + 20x2 = x + -1x

Combine like terms: -30x + -1x = -31x
10 + -31x + 20x2 = x + -1x

Combine like terms: x + -1x = 0
10 + -31x + 20x2 = 0

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

Divide each side by '20'.
0.5 + -1.55x + x2 = 0.0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -1.55x + -0.5 + x2 = 0.0 + -0.5

Reorder the terms:
0.5 + -0.5 + -1.55x + x2 = 0.0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -1.55x + x2 = 0.0 + -0.5
-1.55x + x2 = 0.0 + -0.5

Combine like terms: 0.0 + -0.5 = -0.5
-1.55x + x2 = -0.5

The x term is -1.55x.  Take half its coefficient (-0.775).
Square it (0.600625) and add it to both sides.

Add '0.600625' to each side of the equation.
-1.55x + 0.600625 + x2 = -0.5 + 0.600625

Reorder the terms:
0.600625 + -1.55x + x2 = -0.5 + 0.600625

Combine like terms: -0.5 + 0.600625 = 0.100625
0.600625 + -1.55x + x2 = 0.100625

Factor a perfect square on the left side:
(x + -0.775)(x + -0.775) = 0.100625

Calculate the square root of the right side: 0.317214439

Break this problem into two subproblems by setting 
(x + -0.775) equal to 0.317214439 and -0.317214439.

Subproblem 1

x + -0.775 = 0.317214439 Simplifying x + -0.775 = 0.317214439 Reorder the terms: -0.775 + x = 0.317214439 Solving -0.775 + x = 0.317214439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.775' to each side of the equation. -0.775 + 0.775 + x = 0.317214439 + 0.775 Combine like terms: -0.775 + 0.775 = 0.000 0.000 + x = 0.317214439 + 0.775 x = 0.317214439 + 0.775 Combine like terms: 0.317214439 + 0.775 = 1.092214439 x = 1.092214439 Simplifying x = 1.092214439

Subproblem 2

x + -0.775 = -0.317214439 Simplifying x + -0.775 = -0.317214439 Reorder the terms: -0.775 + x = -0.317214439 Solving -0.775 + x = -0.317214439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.775' to each side of the equation. -0.775 + 0.775 + x = -0.317214439 + 0.775 Combine like terms: -0.775 + 0.775 = 0.000 0.000 + x = -0.317214439 + 0.775 x = -0.317214439 + 0.775 Combine like terms: -0.317214439 + 0.775 = 0.457785561 x = 0.457785561 Simplifying x = 0.457785561

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.092214439, 0.457785561}

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