(4x-1)(2x+3)=18x-4

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Solution for (4x-1)(2x+3)=18x-4 equation:


Simplifying
(4x + -1)(2x + 3) = 18x + -4

Reorder the terms:
(-1 + 4x)(2x + 3) = 18x + -4

Reorder the terms:
(-1 + 4x)(3 + 2x) = 18x + -4

Multiply (-1 + 4x) * (3 + 2x)
(-1(3 + 2x) + 4x * (3 + 2x)) = 18x + -4
((3 * -1 + 2x * -1) + 4x * (3 + 2x)) = 18x + -4
((-3 + -2x) + 4x * (3 + 2x)) = 18x + -4
(-3 + -2x + (3 * 4x + 2x * 4x)) = 18x + -4
(-3 + -2x + (12x + 8x2)) = 18x + -4

Combine like terms: -2x + 12x = 10x
(-3 + 10x + 8x2) = 18x + -4

Reorder the terms:
-3 + 10x + 8x2 = -4 + 18x

Solving
-3 + 10x + 8x2 = -4 + 18x

Solving for variable 'x'.

Reorder the terms:
-3 + 4 + 10x + -18x + 8x2 = -4 + 18x + 4 + -18x

Combine like terms: -3 + 4 = 1
1 + 10x + -18x + 8x2 = -4 + 18x + 4 + -18x

Combine like terms: 10x + -18x = -8x
1 + -8x + 8x2 = -4 + 18x + 4 + -18x

Reorder the terms:
1 + -8x + 8x2 = -4 + 4 + 18x + -18x

Combine like terms: -4 + 4 = 0
1 + -8x + 8x2 = 0 + 18x + -18x
1 + -8x + 8x2 = 18x + -18x

Combine like terms: 18x + -18x = 0
1 + -8x + 8x2 = 0

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

Divide each side by '8'.
0.125 + -1x + x2 = 0

Move the constant term to the right:

Add '-0.125' to each side of the equation.
0.125 + -1x + -0.125 + x2 = 0 + -0.125

Reorder the terms:
0.125 + -0.125 + -1x + x2 = 0 + -0.125

Combine like terms: 0.125 + -0.125 = 0.000
0.000 + -1x + x2 = 0 + -0.125
-1x + x2 = 0 + -0.125

Combine like terms: 0 + -0.125 = -0.125
-1x + x2 = -0.125

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -0.125 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -0.125 + 0.25

Combine like terms: -0.125 + 0.25 = 0.125
0.25 + -1x + x2 = 0.125

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.125

Calculate the square root of the right side: 0.353553391

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.353553391 and -0.353553391.

Subproblem 1

x + -0.5 = 0.353553391 Simplifying x + -0.5 = 0.353553391 Reorder the terms: -0.5 + x = 0.353553391 Solving -0.5 + x = 0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.353553391 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.353553391 + 0.5 x = 0.353553391 + 0.5 Combine like terms: 0.353553391 + 0.5 = 0.853553391 x = 0.853553391 Simplifying x = 0.853553391

Subproblem 2

x + -0.5 = -0.353553391 Simplifying x + -0.5 = -0.353553391 Reorder the terms: -0.5 + x = -0.353553391 Solving -0.5 + x = -0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.353553391 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.353553391 + 0.5 x = -0.353553391 + 0.5 Combine like terms: -0.353553391 + 0.5 = 0.146446609 x = 0.146446609 Simplifying x = 0.146446609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.853553391, 0.146446609}

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