Which is the correct way to evaluate (15)
for the function
()=2(+3)

Start by substituting 15 for x. Then, simplify to get
(15)=36

Start by letting
2(+3)=15
, then solve for x. When solved, the answer is x = 4.5.

Since
(15)
means the output value is 15, the function evaluates to
(15)=15

Since
(15)
is not within the domain of the function, it cannot be evaluated.