(2x+1)(4x-1)=32

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Solution for (2x+1)(4x-1)=32 equation:


Simplifying
(2x + 1)(4x + -1) = 32

Reorder the terms:
(1 + 2x)(4x + -1) = 32

Reorder the terms:
(1 + 2x)(-1 + 4x) = 32

Multiply (1 + 2x) * (-1 + 4x)
(1(-1 + 4x) + 2x * (-1 + 4x)) = 32
((-1 * 1 + 4x * 1) + 2x * (-1 + 4x)) = 32
((-1 + 4x) + 2x * (-1 + 4x)) = 32
(-1 + 4x + (-1 * 2x + 4x * 2x)) = 32
(-1 + 4x + (-2x + 8x2)) = 32

Combine like terms: 4x + -2x = 2x
(-1 + 2x + 8x2) = 32

Solving
-1 + 2x + 8x2 = 32

Solving for variable 'x'.

Reorder the terms:
-1 + -32 + 2x + 8x2 = 32 + -32

Combine like terms: -1 + -32 = -33
-33 + 2x + 8x2 = 32 + -32

Combine like terms: 32 + -32 = 0
-33 + 2x + 8x2 = 0

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

Divide each side by '8'.
-4.125 + 0.25x + x2 = 0

Move the constant term to the right:

Add '4.125' to each side of the equation.
-4.125 + 0.25x + 4.125 + x2 = 0 + 4.125

Reorder the terms:
-4.125 + 4.125 + 0.25x + x2 = 0 + 4.125

Combine like terms: -4.125 + 4.125 = 0.000
0.000 + 0.25x + x2 = 0 + 4.125
0.25x + x2 = 0 + 4.125

Combine like terms: 0 + 4.125 = 4.125
0.25x + x2 = 4.125

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 4.125 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 4.125 + 0.015625

Combine like terms: 4.125 + 0.015625 = 4.140625
0.015625 + 0.25x + x2 = 4.140625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 4.140625

Calculate the square root of the right side: 2.034852575

Break this problem into two subproblems by setting 
(x + 0.125) equal to 2.034852575 and -2.034852575.

Subproblem 1

x + 0.125 = 2.034852575 Simplifying x + 0.125 = 2.034852575 Reorder the terms: 0.125 + x = 2.034852575 Solving 0.125 + x = 2.034852575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 2.034852575 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 2.034852575 + -0.125 x = 2.034852575 + -0.125 Combine like terms: 2.034852575 + -0.125 = 1.909852575 x = 1.909852575 Simplifying x = 1.909852575

Subproblem 2

x + 0.125 = -2.034852575 Simplifying x + 0.125 = -2.034852575 Reorder the terms: 0.125 + x = -2.034852575 Solving 0.125 + x = -2.034852575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -2.034852575 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -2.034852575 + -0.125 x = -2.034852575 + -0.125 Combine like terms: -2.034852575 + -0.125 = -2.159852575 x = -2.159852575 Simplifying x = -2.159852575

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.909852575, -2.159852575}

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