(2x-3)(5x-1)=2x+0.4

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Solution for (2x-3)(5x-1)=2x+0.4 equation:


Simplifying
(2x + -3)(5x + -1) = 2x + 0.4

Reorder the terms:
(-3 + 2x)(5x + -1) = 2x + 0.4

Reorder the terms:
(-3 + 2x)(-1 + 5x) = 2x + 0.4

Multiply (-3 + 2x) * (-1 + 5x)
(-3(-1 + 5x) + 2x * (-1 + 5x)) = 2x + 0.4
((-1 * -3 + 5x * -3) + 2x * (-1 + 5x)) = 2x + 0.4
((3 + -15x) + 2x * (-1 + 5x)) = 2x + 0.4
(3 + -15x + (-1 * 2x + 5x * 2x)) = 2x + 0.4
(3 + -15x + (-2x + 10x2)) = 2x + 0.4

Combine like terms: -15x + -2x = -17x
(3 + -17x + 10x2) = 2x + 0.4

Reorder the terms:
3 + -17x + 10x2 = 0.4 + 2x

Solving
3 + -17x + 10x2 = 0.4 + 2x

Solving for variable 'x'.

Reorder the terms:
3 + -0.4 + -17x + -2x + 10x2 = 0.4 + 2x + -0.4 + -2x

Combine like terms: 3 + -0.4 = 2.6
2.6 + -17x + -2x + 10x2 = 0.4 + 2x + -0.4 + -2x

Combine like terms: -17x + -2x = -19x
2.6 + -19x + 10x2 = 0.4 + 2x + -0.4 + -2x

Reorder the terms:
2.6 + -19x + 10x2 = 0.4 + -0.4 + 2x + -2x

Combine like terms: 0.4 + -0.4 = 0.0
2.6 + -19x + 10x2 = 0.0 + 2x + -2x
2.6 + -19x + 10x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
2.6 + -19x + 10x2 = 0

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

Divide each side by '10'.
0.26 + -1.9x + x2 = 0.0

Move the constant term to the right:

Add '-0.26' to each side of the equation.
0.26 + -1.9x + -0.26 + x2 = 0.0 + -0.26

Reorder the terms:
0.26 + -0.26 + -1.9x + x2 = 0.0 + -0.26

Combine like terms: 0.26 + -0.26 = 0.00
0.00 + -1.9x + x2 = 0.0 + -0.26
-1.9x + x2 = 0.0 + -0.26

Combine like terms: 0.0 + -0.26 = -0.26
-1.9x + x2 = -0.26

The x term is -1.9x.  Take half its coefficient (-0.95).
Square it (0.9025) and add it to both sides.

Add '0.9025' to each side of the equation.
-1.9x + 0.9025 + x2 = -0.26 + 0.9025

Reorder the terms:
0.9025 + -1.9x + x2 = -0.26 + 0.9025

Combine like terms: -0.26 + 0.9025 = 0.6425
0.9025 + -1.9x + x2 = 0.6425

Factor a perfect square on the left side:
(x + -0.95)(x + -0.95) = 0.6425

Calculate the square root of the right side: 0.801560977

Break this problem into two subproblems by setting 
(x + -0.95) equal to 0.801560977 and -0.801560977.

Subproblem 1

x + -0.95 = 0.801560977 Simplifying x + -0.95 = 0.801560977 Reorder the terms: -0.95 + x = 0.801560977 Solving -0.95 + x = 0.801560977 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = 0.801560977 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = 0.801560977 + 0.95 x = 0.801560977 + 0.95 Combine like terms: 0.801560977 + 0.95 = 1.751560977 x = 1.751560977 Simplifying x = 1.751560977

Subproblem 2

x + -0.95 = -0.801560977 Simplifying x + -0.95 = -0.801560977 Reorder the terms: -0.95 + x = -0.801560977 Solving -0.95 + x = -0.801560977 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = -0.801560977 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = -0.801560977 + 0.95 x = -0.801560977 + 0.95 Combine like terms: -0.801560977 + 0.95 = 0.148439023 x = 0.148439023 Simplifying x = 0.148439023

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.751560977, 0.148439023}

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