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

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


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

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

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

Multiply (-1 + 4x) * (4 + 2x)
(-1(4 + 2x) + 4x * (4 + 2x)) = 3x
((4 * -1 + 2x * -1) + 4x * (4 + 2x)) = 3x
((-4 + -2x) + 4x * (4 + 2x)) = 3x
(-4 + -2x + (4 * 4x + 2x * 4x)) = 3x
(-4 + -2x + (16x + 8x2)) = 3x

Combine like terms: -2x + 16x = 14x
(-4 + 14x + 8x2) = 3x

Solving
-4 + 14x + 8x2 = 3x

Solving for variable 'x'.

Reorder the terms:
-4 + 14x + -3x + 8x2 = 3x + -3x

Combine like terms: 14x + -3x = 11x
-4 + 11x + 8x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-4 + 11x + 8x2 = 0

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

Divide each side by '8'.
-0.5 + 1.375x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 1.375x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 1.375x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 1.375x + x2 = 0 + 0.5
1.375x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
1.375x + x2 = 0.5

The x term is 1.375x.  Take half its coefficient (0.6875).
Square it (0.47265625) and add it to both sides.

Add '0.47265625' to each side of the equation.
1.375x + 0.47265625 + x2 = 0.5 + 0.47265625

Reorder the terms:
0.47265625 + 1.375x + x2 = 0.5 + 0.47265625

Combine like terms: 0.5 + 0.47265625 = 0.97265625
0.47265625 + 1.375x + x2 = 0.97265625

Factor a perfect square on the left side:
(x + 0.6875)(x + 0.6875) = 0.97265625

Calculate the square root of the right side: 0.986233365

Break this problem into two subproblems by setting 
(x + 0.6875) equal to 0.986233365 and -0.986233365.

Subproblem 1

x + 0.6875 = 0.986233365 Simplifying x + 0.6875 = 0.986233365 Reorder the terms: 0.6875 + x = 0.986233365 Solving 0.6875 + x = 0.986233365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6875' to each side of the equation. 0.6875 + -0.6875 + x = 0.986233365 + -0.6875 Combine like terms: 0.6875 + -0.6875 = 0.0000 0.0000 + x = 0.986233365 + -0.6875 x = 0.986233365 + -0.6875 Combine like terms: 0.986233365 + -0.6875 = 0.298733365 x = 0.298733365 Simplifying x = 0.298733365

Subproblem 2

x + 0.6875 = -0.986233365 Simplifying x + 0.6875 = -0.986233365 Reorder the terms: 0.6875 + x = -0.986233365 Solving 0.6875 + x = -0.986233365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6875' to each side of the equation. 0.6875 + -0.6875 + x = -0.986233365 + -0.6875 Combine like terms: 0.6875 + -0.6875 = 0.0000 0.0000 + x = -0.986233365 + -0.6875 x = -0.986233365 + -0.6875 Combine like terms: -0.986233365 + -0.6875 = -1.673733365 x = -1.673733365 Simplifying x = -1.673733365

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.298733365, -1.673733365}

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