(x+6)(4x-3)=1

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Solution for (x+6)(4x-3)=1 equation:


Simplifying
(x + 6)(4x + -3) = 1

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

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

Multiply (6 + x) * (-3 + 4x)
(6(-3 + 4x) + x(-3 + 4x)) = 1
((-3 * 6 + 4x * 6) + x(-3 + 4x)) = 1
((-18 + 24x) + x(-3 + 4x)) = 1
(-18 + 24x + (-3 * x + 4x * x)) = 1
(-18 + 24x + (-3x + 4x2)) = 1

Combine like terms: 24x + -3x = 21x
(-18 + 21x + 4x2) = 1

Solving
-18 + 21x + 4x2 = 1

Solving for variable 'x'.

Reorder the terms:
-18 + -1 + 21x + 4x2 = 1 + -1

Combine like terms: -18 + -1 = -19
-19 + 21x + 4x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-19 + 21x + 4x2 = 0

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

Divide each side by '4'.
-4.75 + 5.25x + x2 = 0

Move the constant term to the right:

Add '4.75' to each side of the equation.
-4.75 + 5.25x + 4.75 + x2 = 0 + 4.75

Reorder the terms:
-4.75 + 4.75 + 5.25x + x2 = 0 + 4.75

Combine like terms: -4.75 + 4.75 = 0.00
0.00 + 5.25x + x2 = 0 + 4.75
5.25x + x2 = 0 + 4.75

Combine like terms: 0 + 4.75 = 4.75
5.25x + x2 = 4.75

The x term is 5.25x.  Take half its coefficient (2.625).
Square it (6.890625) and add it to both sides.

Add '6.890625' to each side of the equation.
5.25x + 6.890625 + x2 = 4.75 + 6.890625

Reorder the terms:
6.890625 + 5.25x + x2 = 4.75 + 6.890625

Combine like terms: 4.75 + 6.890625 = 11.640625
6.890625 + 5.25x + x2 = 11.640625

Factor a perfect square on the left side:
(x + 2.625)(x + 2.625) = 11.640625

Calculate the square root of the right side: 3.411836016

Break this problem into two subproblems by setting 
(x + 2.625) equal to 3.411836016 and -3.411836016.

Subproblem 1

x + 2.625 = 3.411836016 Simplifying x + 2.625 = 3.411836016 Reorder the terms: 2.625 + x = 3.411836016 Solving 2.625 + x = 3.411836016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.625' to each side of the equation. 2.625 + -2.625 + x = 3.411836016 + -2.625 Combine like terms: 2.625 + -2.625 = 0.000 0.000 + x = 3.411836016 + -2.625 x = 3.411836016 + -2.625 Combine like terms: 3.411836016 + -2.625 = 0.786836016 x = 0.786836016 Simplifying x = 0.786836016

Subproblem 2

x + 2.625 = -3.411836016 Simplifying x + 2.625 = -3.411836016 Reorder the terms: 2.625 + x = -3.411836016 Solving 2.625 + x = -3.411836016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.625' to each side of the equation. 2.625 + -2.625 + x = -3.411836016 + -2.625 Combine like terms: 2.625 + -2.625 = 0.000 0.000 + x = -3.411836016 + -2.625 x = -3.411836016 + -2.625 Combine like terms: -3.411836016 + -2.625 = -6.036836016 x = -6.036836016 Simplifying x = -6.036836016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.786836016, -6.036836016}

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