Y=k(x+2)(x-4)

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Solution for Y=k(x+2)(x-4) equation: 


Simplifying
Y = k(x + 2)(x + -4)

Reorder the terms:
Y = k(2 + x)(x + -4)

Reorder the terms:
Y = k(2 + x)(-4 + x)

Multiply (2 + x) * (-4 + x)
Y = k(2(-4 + x) + x(-4 + x))
Y = k((-4 * 2 + x * 2) + x(-4 + x))
Y = k((-8 + 2x) + x(-4 + x))
Y = k(-8 + 2x + (-4 * x + x * x))
Y = k(-8 + 2x + (-4x + x2))

Combine like terms: 2x + -4x = -2x
Y = k(-8 + -2x + x2)
Y = (-8 * k + -2x * k + x2 * k)
Y = (-8k + -2kx + kx2)

Solving
Y = -8k + -2kx + kx2

Solving for variable 'Y'.

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

Simplifying
Y = -8k + -2kx + kx2

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