Answer:
I think you need to multiply 12 and 7 and then cut that in half
G2=g1*2
g3=g1*2²
196=x*4
/4 /4
49
The square root of 5 is 2
ANSWER
all real numbers
EXPLANATION
The given absolute value function is

This function is obtained by shifting the graph of

to the left by 2 units.
Since the domain of the parent function is all real numbers, the domain of the transformed function is also all real numbers because the shifting the parent function horizontally or vertically does not affect the domain.