(fg)(x)=(3x^2+11x+8)(x+1)

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Solution for (fg)(x)=(3x^2+11x+8)(x+1) equation:


Simplifying
(fg)(x) = (3x2 + 11x + 8)(x + 1)

Multiply fg * x
fgx = (3x2 + 11x + 8)(x + 1)

Reorder the terms:
fgx = (8 + 11x + 3x2)(x + 1)

Reorder the terms:
fgx = (8 + 11x + 3x2)(1 + x)

Multiply (8 + 11x + 3x2) * (1 + x)
fgx = (8(1 + x) + 11x * (1 + x) + 3x2 * (1 + x))
fgx = ((1 * 8 + x * 8) + 11x * (1 + x) + 3x2 * (1 + x))
fgx = ((8 + 8x) + 11x * (1 + x) + 3x2 * (1 + x))
fgx = (8 + 8x + (1 * 11x + x * 11x) + 3x2 * (1 + x))
fgx = (8 + 8x + (11x + 11x2) + 3x2 * (1 + x))
fgx = (8 + 8x + 11x + 11x2 + (1 * 3x2 + x * 3x2))
fgx = (8 + 8x + 11x + 11x2 + (3x2 + 3x3))

Combine like terms: 8x + 11x = 19x
fgx = (8 + 19x + 11x2 + 3x2 + 3x3)

Combine like terms: 11x2 + 3x2 = 14x2
fgx = (8 + 19x + 14x2 + 3x3)

Solving
fgx = 8 + 19x + 14x2 + 3x3

Solving for variable 'f'.

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

Divide each side by 'gx'.
f = 8g-1x-1 + 19g-1 + 14g-1x + 3g-1x2

Simplifying
f = 8g-1x-1 + 19g-1 + 14g-1x + 3g-1x2

Reorder the terms:
f = 19g-1 + 8g-1x-1 + 14g-1x + 3g-1x2

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