algebra......
posted by i need help from anyone! .
Given f(x)=(x−1)(x−2)+(x−2)(x−5)+(x−3)(x−8), what are the sum of the roots of f(x)?

f(x) = 3x^2  21x + 36
sum of roots is (21/3) = 7
posted by i need help from anyone! .
Given f(x)=(x−1)(x−2)+(x−2)(x−5)+(x−3)(x−8), what are the sum of the roots of f(x)?
f(x) = 3x^2  21x + 36
sum of roots is (21/3) = 7