range of the function?

Question

Match the range of the function f(x) = x2 + 2x − 1 to its domain.

range 2 -2 3 -3

domains 2 14 7 -1

Answer 1

x=2 y=2^2 +2(2) -1 = 4+4-1 = 7

2 matches with 7

x=-2 y=4-4-1 = -1

-2 matches -1

x=3 y=9+6-1 = 14

3 matches with 14

x =-3, y = 9-6 -1 = 2

-3 matches with 2