y=3(x-1)(x+1)

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

Simplifying
y = 3(x + -1)(x + 1)

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

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

Multiply (-1 + x) * (1 + x)
y = 3(-1(1 + x) + x(1 + x))
y = 3((1 * -1 + x * -1) + x(1 + x))
y = 3((-1 + -1x) + x(1 + x))
y = 3(-1 + -1x + (1 * x + x * x))
y = 3(-1 + -1x + (1x + x2))

Combine like terms: -1x + 1x = 0
y = 3(-1 + 0 + x2)
y = 3(-1 + x2)
y = (-1 * 3 + x2 * 3)
y = (-3 + 3x2)

Solving
y = -3 + 3x2

Solving for variable 'y'.

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

Simplifying
y = -3 + 3x2