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

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


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

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

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

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

Combine like terms: -3x + 1x = -2x
y = 3(-3 + -2x + x2)
y = (-3 * 3 + -2x * 3 + x2 * 3)
y = (-9 + -6x + 3x2)

Solving
y = -9 + -6x + 3x2

Solving for variable 'y'.

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

Simplifying
y = -9 + -6x + 3x2

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