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

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

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

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

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

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

Combine like terms: 1x + -3x = -2x
y = x(-3 + -2x + x2)
y = (-3 * x + -2x * x + x2 * x)
y = (-3x + -2x2 + x3)

Solving
y = -3x + -2x2 + x3

Solving for variable 'y'.

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

Simplifying
y = -3x + -2x2 + x3