If a polynomial function f(x) has roots 0, 4, and 3+the root of
11, what must also be a root of fx)?

3 -

Step-by-step explanation:

Note that radical roots occur in conjugate pairs, thus

3 + is a root then 3 - is also a root

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!