f(x)=(3x+4)(3x-4)

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Solution for f(x)=(3x+4)(3x-4) equation:


Simplifying
f(x) = (3x + 4)(3x + -4)

Multiply f * x
fx = (3x + 4)(3x + -4)

Reorder the terms:
fx = (4 + 3x)(3x + -4)

Reorder the terms:
fx = (4 + 3x)(-4 + 3x)

Multiply (4 + 3x) * (-4 + 3x)
fx = (4(-4 + 3x) + 3x * (-4 + 3x))
fx = ((-4 * 4 + 3x * 4) + 3x * (-4 + 3x))
fx = ((-16 + 12x) + 3x * (-4 + 3x))
fx = (-16 + 12x + (-4 * 3x + 3x * 3x))
fx = (-16 + 12x + (-12x + 9x2))

Combine like terms: 12x + -12x = 0
fx = (-16 + 0 + 9x2)
fx = (-16 + 9x2)

Solving
fx = -16 + 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 = -16x-1 + 9x

Simplifying
f = -16x-1 + 9x

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