Answer:
R = {15, 25, 7}
Explanation:
the domain of the function has the values of x for which the resulting values in y form the range.
simply put the values 2, -3 and 0 one by one in the equation and the respective values of y you get will be the range
#1) x = 2
f(2) = 2(2)² + 7
f(2) = 8 + 7
f(2) = 15
#2) x = -3
f(-3) = 2(-3)² + 7
f(-3) = 2 × 9 + 7
f(-3) = 18 + 7
f(-3) = 25
#3) x = 0
f(0) = 2(0)² + 7
f(0) = 7
the underlined values form the range of the function
hence
range R = {15, 25, 7}