If a polynomial function f(x) has roots 3 and square root of 7 what must also be a root of f(x)?
a negative square root of 7
b i square root of seven
c –3
d 3i

A is correct.

Step-by-step explanation:

A polynomial function f(x) has root .

3 is a real number.

is an irrational number.

The zeros or root of the function always occurs in conjugate pair.

Conjugate pair: A root has two form one positive and one negative.

e.g:

For the given function f(x), should be in conjugate pair.

One more possible root would be

Hence, the one root must be negative of root of 7

d

step-by-step explanation:

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2