f(x)=(9x-1)(4x-3)

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Solution for f(x)=(9x-1)(4x-3) equation: 


Simplifying
f(x) = (9x + -1)(4x + -3)

Multiply f * x
fx = (9x + -1)(4x + -3)

Reorder the terms:
fx = (-1 + 9x)(4x + -3)

Reorder the terms:
fx = (-1 + 9x)(-3 + 4x)

Multiply (-1 + 9x) * (-3 + 4x)
fx = (-1(-3 + 4x) + 9x * (-3 + 4x))
fx = ((-3 * -1 + 4x * -1) + 9x * (-3 + 4x))
fx = ((3 + -4x) + 9x * (-3 + 4x))
fx = (3 + -4x + (-3 * 9x + 4x * 9x))
fx = (3 + -4x + (-27x + 36x2))

Combine like terms: -4x + -27x = -31x
fx = (3 + -31x + 36x2)

Solving
fx = 3 + -31x + 36x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 3x-1 + -31 + 36x

Simplifying
f = 3x-1 + -31 + 36x

Reorder the terms:
f = -31 + 3x-1 + 36x

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