f(x)=(x-8)(x+5)(x-2)

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Solution for f(x)=(x-8)(x+5)(x-2) equation:


Simplifying
f(x) = (x + -8)(x + 5)(x + -2)

Multiply f * x
fx = (x + -8)(x + 5)(x + -2)

Reorder the terms:
fx = (-8 + x)(x + 5)(x + -2)

Reorder the terms:
fx = (-8 + x)(5 + x)(x + -2)

Reorder the terms:
fx = (-8 + x)(5 + x)(-2 + x)

Multiply (-8 + x) * (5 + x)
fx = (-8(5 + x) + x(5 + x))(-2 + x)
fx = ((5 * -8 + x * -8) + x(5 + x))(-2 + x)
fx = ((-40 + -8x) + x(5 + x))(-2 + x)
fx = (-40 + -8x + (5 * x + x * x))(-2 + x)
fx = (-40 + -8x + (5x + x2))(-2 + x)

Combine like terms: -8x + 5x = -3x
fx = (-40 + -3x + x2)(-2 + x)

Multiply (-40 + -3x + x2) * (-2 + x)
fx = (-40(-2 + x) + -3x * (-2 + x) + x2(-2 + x))
fx = ((-2 * -40 + x * -40) + -3x * (-2 + x) + x2(-2 + x))
fx = ((80 + -40x) + -3x * (-2 + x) + x2(-2 + x))
fx = (80 + -40x + (-2 * -3x + x * -3x) + x2(-2 + x))
fx = (80 + -40x + (6x + -3x2) + x2(-2 + x))
fx = (80 + -40x + 6x + -3x2 + (-2 * x2 + x * x2))
fx = (80 + -40x + 6x + -3x2 + (-2x2 + x3))

Combine like terms: -40x + 6x = -34x
fx = (80 + -34x + -3x2 + -2x2 + x3)

Combine like terms: -3x2 + -2x2 = -5x2
fx = (80 + -34x + -5x2 + x3)

Solving
fx = 80 + -34x + -5x2 + x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 80x-1 + -34 + -5x + x2

Simplifying
f = 80x-1 + -34 + -5x + x2

Reorder the terms:
f = -34 + 80x-1 + -5x + x2

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