(fg)(x)=(5x^2-4x)(x^2-x+3)

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Solution for (fg)(x)=(5x^2-4x)(x^2-x+3) equation:


Simplifying
(fg)(x) = (5x2 + -4x)(x2 + -1x + 3)

Multiply fg * x
fgx = (5x2 + -4x)(x2 + -1x + 3)

Reorder the terms:
fgx = (-4x + 5x2)(x2 + -1x + 3)

Reorder the terms:
fgx = (-4x + 5x2)(3 + -1x + x2)

Multiply (-4x + 5x2) * (3 + -1x + x2)
fgx = (-4x * (3 + -1x + x2) + 5x2 * (3 + -1x + x2))
fgx = ((3 * -4x + -1x * -4x + x2 * -4x) + 5x2 * (3 + -1x + x2))
fgx = ((-12x + 4x2 + -4x3) + 5x2 * (3 + -1x + x2))
fgx = (-12x + 4x2 + -4x3 + (3 * 5x2 + -1x * 5x2 + x2 * 5x2))
fgx = (-12x + 4x2 + -4x3 + (15x2 + -5x3 + 5x4))

Reorder the terms:
fgx = (-12x + 4x2 + 15x2 + -4x3 + -5x3 + 5x4)

Combine like terms: 4x2 + 15x2 = 19x2
fgx = (-12x + 19x2 + -4x3 + -5x3 + 5x4)

Combine like terms: -4x3 + -5x3 = -9x3
fgx = (-12x + 19x2 + -9x3 + 5x4)

Solving
fgx = -12x + 19x2 + -9x3 + 5x4

Solving for variable 'f'.

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

Divide each side by 'gx'.
f = -12g-1 + 19g-1x + -9g-1x2 + 5g-1x3

Simplifying
f = -12g-1 + 19g-1x + -9g-1x2 + 5g-1x3

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