If a polynomial function f(x) has roots –9 and 7 – i, what must be a factor of f(x)?

see explanation

Step-by-step explanation:

If a polynomial has roots x = a, x = b, x = c then

(x - a), (x - b) and (x - c) are the factors of the polynomial.

Note that complex roots occur in conjugate pairs, thus

x = - i is a root then so is x = i

given f(x) has roots

x = - 9, x = 7 and x = - i, x = i, then

(x + 9), (x - 7), (x + i), (x - i) are the factors of f(x)

13.33%

say 50 oranges, then 100 apples

80 are red, 20 are yellow

total fruit = 150

20chances out of 150 for yellow

20/150 = 13.33%

c

step-by-step explanation: