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

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

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

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

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

Multiply (1 + x) * (-1 + x)
(1(-1 + x) + x(-1 + x)) = 6
((-1 * 1 + x * 1) + x(-1 + x)) = 6
((-1 + 1x) + x(-1 + x)) = 6
(-1 + 1x + (-1 * x + x * x)) = 6
(-1 + 1x + (-1x + x2)) = 6

Combine like terms: 1x + -1x = 0
(-1 + 0 + x2) = 6
(-1 + x2) = 6

Solving
-1 + x2 = 6

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + x2 = 6 + 1

Combine like terms: -1 + 1 = 0
0 + x2 = 6 + 1
x2 = 6 + 1

Combine like terms: 6 + 1 = 7
x2 = 7

Simplifying
x2 = 7

Take the square root of each side:
x = {-2.645751311, 2.645751311}