y=(x+0.2)(x+0.6)(x+0.8)

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Solution for y=(x+0.2)(x+0.6)(x+0.8) equation: 


Simplifying
y = (x + 0.2)(x + 0.6)(x + 0.8)

Reorder the terms:
y = (0.2 + x)(x + 0.6)(x + 0.8)

Reorder the terms:
y = (0.2 + x)(0.6 + x)(x + 0.8)

Reorder the terms:
y = (0.2 + x)(0.6 + x)(0.8 + x)

Multiply (0.2 + x) * (0.6 + x)
y = (0.2(0.6 + x) + x(0.6 + x))(0.8 + x)
y = ((0.6 * 0.2 + x * 0.2) + x(0.6 + x))(0.8 + x)
y = ((0.12 + 0.2x) + x(0.6 + x))(0.8 + x)
y = (0.12 + 0.2x + (0.6 * x + x * x))(0.8 + x)
y = (0.12 + 0.2x + (0.6x + x2))(0.8 + x)

Combine like terms: 0.2x + 0.6x = 0.8x
y = (0.12 + 0.8x + x2)(0.8 + x)

Multiply (0.12 + 0.8x + x2) * (0.8 + x)
y = (0.12(0.8 + x) + 0.8x * (0.8 + x) + x2(0.8 + x))
y = ((0.8 * 0.12 + x * 0.12) + 0.8x * (0.8 + x) + x2(0.8 + x))
y = ((0.096 + 0.12x) + 0.8x * (0.8 + x) + x2(0.8 + x))
y = (0.096 + 0.12x + (0.8 * 0.8x + x * 0.8x) + x2(0.8 + x))
y = (0.096 + 0.12x + (0.64x + 0.8x2) + x2(0.8 + x))
y = (0.096 + 0.12x + 0.64x + 0.8x2 + (0.8 * x2 + x * x2))
y = (0.096 + 0.12x + 0.64x + 0.8x2 + (0.8x2 + x3))

Combine like terms: 0.12x + 0.64x = 0.76x
y = (0.096 + 0.76x + 0.8x2 + 0.8x2 + x3)

Combine like terms: 0.8x2 + 0.8x2 = 1.6x2
y = (0.096 + 0.76x + 1.6x2 + x3)

Solving
y = 0.096 + 0.76x + 1.6x2 + x3

Solving for variable 'y'.

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

Simplifying
y = 0.096 + 0.76x + 1.6x2 + x3

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