5Y=(X+1)(X-1)-1

Solution for 5Y=(X+1)(X-1)-1 equation:

Simplifying
5Y = (X + 1)(X + -1) + -1

Reorder the terms:
5Y = (1 + X)(X + -1) + -1

Reorder the terms:
5Y = (1 + X)(-1 + X) + -1

Multiply (1 + X) * (-1 + X)
5Y = (1(-1 + X) + X(-1 + X)) + -1
5Y = ((-1 * 1 + X * 1) + X(-1 + X)) + -1
5Y = ((-1 + 1X) + X(-1 + X)) + -1
5Y = (-1 + 1X + (-1 * X + X * X)) + -1
5Y = (-1 + 1X + (-1X + X2)) + -1

Combine like terms: 1X + -1X = 0
5Y = (-1 + 0 + X2) + -1
5Y = (-1 + X2) + -1

Reorder the terms:
5Y = -1 + -1 + X2

Combine like terms: -1 + -1 = -2
5Y = -2 + X2

Solving
5Y = -2 + X2

Solving for variable 'Y'.

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

Divide each side by '5'.
Y = -0.4 + 0.2X2

Simplifying
Y = -0.4 + 0.2X2