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

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


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

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

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

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

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

Combine like terms: -9x + -4x = -13x
fx = (36 + -13x + x2)

Solving
fx = 36 + -13x + x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 36x-1 + -13 + x

Simplifying
f = 36x-1 + -13 + x

Reorder the terms:
f = -13 + 36x-1 + x

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