Question

9th sum plzzzzzzzz do it fast it's urgent

Answer 1

sum of all coefficients is 0, so (x-1) is a factor
dividing f(x) by (x-1)
we get

$f(x) = (x - 1)(x^{2} - 22x + 120) \\ \: \: \: \: \: \: \: \: \: \: \: factorising \: by \: spliting \: the \: middle \: term \: we \: get \\ (x - 1)(x - 12)(x - 10)$
please mark brainliest