Which pair of complex numbers has a real-number product?
O
(1 + 3)(61)
(1 + 3)(2-3)
(1 + 3)(1 – 3)
(1 + 3)(3)
and

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

12

step-by-step explanation: