y=-2(x-4)(x+1)

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Solution for y=-2(x-4)(x+1) equation: 


Simplifying
y = -2(x + -4)(x + 1)

Reorder the terms:
y = -2(-4 + x)(x + 1)

Reorder the terms:
y = -2(-4 + x)(1 + x)

Multiply (-4 + x) * (1 + x)
y = -2(-4(1 + x) + x(1 + x))
y = -2((1 * -4 + x * -4) + x(1 + x))
y = -2((-4 + -4x) + x(1 + x))
y = -2(-4 + -4x + (1 * x + x * x))
y = -2(-4 + -4x + (1x + x2))

Combine like terms: -4x + 1x = -3x
y = -2(-4 + -3x + x2)
y = (-4 * -2 + -3x * -2 + x2 * -2)
y = (8 + 6x + -2x2)

Solving
y = 8 + 6x + -2x2

Solving for variable 'y'.

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

Simplifying
y = 8 + 6x + -2x2

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