y=-3(x-1)(x+4)

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Solution for y=-3(x-1)(x+4) equation: 


Simplifying
y = -3(x + -1)(x + 4)

Reorder the terms:
y = -3(-1 + x)(x + 4)

Reorder the terms:
y = -3(-1 + x)(4 + x)

Multiply (-1 + x) * (4 + x)
y = -3(-1(4 + x) + x(4 + x))
y = -3((4 * -1 + x * -1) + x(4 + x))
y = -3((-4 + -1x) + x(4 + x))
y = -3(-4 + -1x + (4 * x + x * x))
y = -3(-4 + -1x + (4x + x2))

Combine like terms: -1x + 4x = 3x
y = -3(-4 + 3x + x2)
y = (-4 * -3 + 3x * -3 + x2 * -3)
y = (12 + -9x + -3x2)

Solving
y = 12 + -9x + -3x2

Solving for variable 'y'.

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

Simplifying
y = 12 + -9x + -3x2

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