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

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


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

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

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

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

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

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

Multiply (-1 + x2) * (-3 + x)
y = (-1(-3 + x) + x2(-3 + x))
y = ((-3 * -1 + x * -1) + x2(-3 + x))
y = ((3 + -1x) + x2(-3 + x))
y = (3 + -1x + (-3 * x2 + x * x2))
y = (3 + -1x + (-3x2 + x3))
y = (3 + -1x + -3x2 + x3)

Solving
y = 3 + -1x + -3x2 + x3

Solving for variable 'y'.

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

Simplifying
y = 3 + -1x + -3x2 + x3

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