84=(x)(x+1)(x-4)

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Solution for 84=(x)(x+1)(x-4) equation: 


Simplifying
84 = (x)(x + 1)(x + -4)

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

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

Multiply (1 + x) * (-4 + x)
84 = x(1(-4 + x) + x(-4 + x))
84 = x((-4 * 1 + x * 1) + x(-4 + x))
84 = x((-4 + 1x) + x(-4 + x))
84 = x(-4 + 1x + (-4 * x + x * x))
84 = x(-4 + 1x + (-4x + x2))

Combine like terms: 1x + -4x = -3x
84 = x(-4 + -3x + x2)
84 = (-4 * x + -3x * x + x2 * x)
84 = (-4x + -3x2 + x3)

Solving
84 = -4x + -3x2 + x3

Solving for variable 'x'.

Reorder the terms:
84 + 4x + 3x2 + -1x3 = -4x + 4x + -3x2 + 3x2 + x3 + -1x3

Combine like terms: -4x + 4x = 0
84 + 4x + 3x2 + -1x3 = 0 + -3x2 + 3x2 + x3 + -1x3
84 + 4x + 3x2 + -1x3 = -3x2 + 3x2 + x3 + -1x3

Combine like terms: -3x2 + 3x2 = 0
84 + 4x + 3x2 + -1x3 = 0 + x3 + -1x3
84 + 4x + 3x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
84 + 4x + 3x2 + -1x3 = 0

The solution to this equation could not be determined.

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