Y=-4(x-8)(x+4)

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Solution for Y=-4(x-8)(x+4) equation: 


Simplifying
Y = -4(x + -8)(x + 4)

Reorder the terms:
Y = -4(-8 + x)(x + 4)

Reorder the terms:
Y = -4(-8 + x)(4 + x)

Multiply (-8 + x) * (4 + x)
Y = -4(-8(4 + x) + x(4 + x))
Y = -4((4 * -8 + x * -8) + x(4 + x))
Y = -4((-32 + -8x) + x(4 + x))
Y = -4(-32 + -8x + (4 * x + x * x))
Y = -4(-32 + -8x + (4x + x2))

Combine like terms: -8x + 4x = -4x
Y = -4(-32 + -4x + x2)
Y = (-32 * -4 + -4x * -4 + x2 * -4)
Y = (128 + 16x + -4x2)

Solving
Y = 128 + 16x + -4x2

Solving for variable 'Y'.

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

Simplifying
Y = 128 + 16x + -4x2

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