y=-3x(x+7)(x-2)

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Solution for y=-3x(x+7)(x-2) equation: 


Simplifying
y = -3x(x + 7)(x + -2)

Reorder the terms:
y = -3x(7 + x)(x + -2)

Reorder the terms:
y = -3x(7 + x)(-2 + x)

Multiply (7 + x) * (-2 + x)
y = -3x(7(-2 + x) + x(-2 + x))
y = -3x((-2 * 7 + x * 7) + x(-2 + x))
y = -3x((-14 + 7x) + x(-2 + x))
y = -3x(-14 + 7x + (-2 * x + x * x))
y = -3x(-14 + 7x + (-2x + x2))

Combine like terms: 7x + -2x = 5x
y = -3x(-14 + 5x + x2)
y = (-14 * -3x + 5x * -3x + x2 * -3x)
y = (42x + -15x2 + -3x3)

Solving
y = 42x + -15x2 + -3x3

Solving for variable 'y'.

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

Simplifying
y = 42x + -15x2 + -3x3

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