8(X+1)(X-1)=4(X+1)+27

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Solution for 8(X+1)(X-1)=4(X+1)+27 equation:


Simplifying
8(X + 1)(X + -1) = 4(X + 1) + 27

Reorder the terms:
8(1 + X)(X + -1) = 4(X + 1) + 27

Reorder the terms:
8(1 + X)(-1 + X) = 4(X + 1) + 27

Multiply (1 + X) * (-1 + X)
8(1(-1 + X) + X(-1 + X)) = 4(X + 1) + 27
8((-1 * 1 + X * 1) + X(-1 + X)) = 4(X + 1) + 27
8((-1 + 1X) + X(-1 + X)) = 4(X + 1) + 27
8(-1 + 1X + (-1 * X + X * X)) = 4(X + 1) + 27
8(-1 + 1X + (-1X + X2)) = 4(X + 1) + 27

Combine like terms: 1X + -1X = 0
8(-1 + 0 + X2) = 4(X + 1) + 27
8(-1 + X2) = 4(X + 1) + 27
(-1 * 8 + X2 * 8) = 4(X + 1) + 27
(-8 + 8X2) = 4(X + 1) + 27

Reorder the terms:
-8 + 8X2 = 4(1 + X) + 27
-8 + 8X2 = (1 * 4 + X * 4) + 27
-8 + 8X2 = (4 + 4X) + 27

Reorder the terms:
-8 + 8X2 = 4 + 27 + 4X

Combine like terms: 4 + 27 = 31
-8 + 8X2 = 31 + 4X

Solving
-8 + 8X2 = 31 + 4X

Solving for variable 'X'.

Reorder the terms:
-8 + -31 + -4X + 8X2 = 31 + 4X + -31 + -4X

Combine like terms: -8 + -31 = -39
-39 + -4X + 8X2 = 31 + 4X + -31 + -4X

Reorder the terms:
-39 + -4X + 8X2 = 31 + -31 + 4X + -4X

Combine like terms: 31 + -31 = 0
-39 + -4X + 8X2 = 0 + 4X + -4X
-39 + -4X + 8X2 = 4X + -4X

Combine like terms: 4X + -4X = 0
-39 + -4X + 8X2 = 0

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

Divide each side by '8'.
-4.875 + -0.5X + X2 = 0

Move the constant term to the right:

Add '4.875' to each side of the equation.
-4.875 + -0.5X + 4.875 + X2 = 0 + 4.875

Reorder the terms:
-4.875 + 4.875 + -0.5X + X2 = 0 + 4.875

Combine like terms: -4.875 + 4.875 = 0.000
0.000 + -0.5X + X2 = 0 + 4.875
-0.5X + X2 = 0 + 4.875

Combine like terms: 0 + 4.875 = 4.875
-0.5X + X2 = 4.875

The X term is -0.5X.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5X + 0.0625 + X2 = 4.875 + 0.0625

Reorder the terms:
0.0625 + -0.5X + X2 = 4.875 + 0.0625

Combine like terms: 4.875 + 0.0625 = 4.9375
0.0625 + -0.5X + X2 = 4.9375

Factor a perfect square on the left side:
(X + -0.25)(X + -0.25) = 4.9375

Calculate the square root of the right side: 2.222048604

Break this problem into two subproblems by setting 
(X + -0.25) equal to 2.222048604 and -2.222048604.

Subproblem 1

X + -0.25 = 2.222048604 Simplifying X + -0.25 = 2.222048604 Reorder the terms: -0.25 + X = 2.222048604 Solving -0.25 + X = 2.222048604 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + X = 2.222048604 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + X = 2.222048604 + 0.25 X = 2.222048604 + 0.25 Combine like terms: 2.222048604 + 0.25 = 2.472048604 X = 2.472048604 Simplifying X = 2.472048604

Subproblem 2

X + -0.25 = -2.222048604 Simplifying X + -0.25 = -2.222048604 Reorder the terms: -0.25 + X = -2.222048604 Solving -0.25 + X = -2.222048604 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + X = -2.222048604 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + X = -2.222048604 + 0.25 X = -2.222048604 + 0.25 Combine like terms: -2.222048604 + 0.25 = -1.972048604 X = -1.972048604 Simplifying X = -1.972048604

Solution

The solution to the problem is based on the solutions from the subproblems. X = {2.472048604, -1.972048604}

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