(5x-1)(2x+1)=2x

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


Simplifying
(5x + -1)(2x + 1) = 2x

Reorder the terms:
(-1 + 5x)(2x + 1) = 2x

Reorder the terms:
(-1 + 5x)(1 + 2x) = 2x

Multiply (-1 + 5x) * (1 + 2x)
(-1(1 + 2x) + 5x * (1 + 2x)) = 2x
((1 * -1 + 2x * -1) + 5x * (1 + 2x)) = 2x
((-1 + -2x) + 5x * (1 + 2x)) = 2x
(-1 + -2x + (1 * 5x + 2x * 5x)) = 2x
(-1 + -2x + (5x + 10x2)) = 2x

Combine like terms: -2x + 5x = 3x
(-1 + 3x + 10x2) = 2x

Solving
-1 + 3x + 10x2 = 2x

Solving for variable 'x'.

Reorder the terms:
-1 + 3x + -2x + 10x2 = 2x + -2x

Combine like terms: 3x + -2x = 1x
-1 + 1x + 10x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-1 + 1x + 10x2 = 0

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

Divide each side by '10'.
-0.1 + 0.1x + x2 = 0.0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + 0.1x + 0.1 + x2 = 0.0 + 0.1

Reorder the terms:
-0.1 + 0.1 + 0.1x + x2 = 0.0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + 0.1x + x2 = 0.0 + 0.1
0.1x + x2 = 0.0 + 0.1

Combine like terms: 0.0 + 0.1 = 0.1
0.1x + x2 = 0.1

The x term is 0.1x.  Take half its coefficient (0.05).
Square it (0.0025) and add it to both sides.

Add '0.0025' to each side of the equation.
0.1x + 0.0025 + x2 = 0.1 + 0.0025

Reorder the terms:
0.0025 + 0.1x + x2 = 0.1 + 0.0025

Combine like terms: 0.1 + 0.0025 = 0.1025
0.0025 + 0.1x + x2 = 0.1025

Factor a perfect square on the left side:
(x + 0.05)(x + 0.05) = 0.1025

Calculate the square root of the right side: 0.320156212

Break this problem into two subproblems by setting 
(x + 0.05) equal to 0.320156212 and -0.320156212.

Subproblem 1

x + 0.05 = 0.320156212 Simplifying x + 0.05 = 0.320156212 Reorder the terms: 0.05 + x = 0.320156212 Solving 0.05 + x = 0.320156212 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + x = 0.320156212 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + x = 0.320156212 + -0.05 x = 0.320156212 + -0.05 Combine like terms: 0.320156212 + -0.05 = 0.270156212 x = 0.270156212 Simplifying x = 0.270156212

Subproblem 2

x + 0.05 = -0.320156212 Simplifying x + 0.05 = -0.320156212 Reorder the terms: 0.05 + x = -0.320156212 Solving 0.05 + x = -0.320156212 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + x = -0.320156212 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + x = -0.320156212 + -0.05 x = -0.320156212 + -0.05 Combine like terms: -0.320156212 + -0.05 = -0.370156212 x = -0.370156212 Simplifying x = -0.370156212

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.270156212, -0.370156212}

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