fx=(7-3x)(3x+7)

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Solution for fx=(7-3x)(3x+7) equation:


Simplifying
fx = (7 + -3x)(3x + 7)

Reorder the terms:
fx = (7 + -3x)(7 + 3x)

Multiply (7 + -3x) * (7 + 3x)
fx = (7(7 + 3x) + -3x * (7 + 3x))
fx = ((7 * 7 + 3x * 7) + -3x * (7 + 3x))
fx = ((49 + 21x) + -3x * (7 + 3x))
fx = (49 + 21x + (7 * -3x + 3x * -3x))
fx = (49 + 21x + (-21x + -9x2))

Combine like terms: 21x + -21x = 0
fx = (49 + 0 + -9x2)
fx = (49 + -9x2)

Solving
fx = 49 + -9x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 49x-1 + -9x

Simplifying
f = 49x-1 + -9x

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