Question

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

2 -2 3 -3
2 --
14 --
7 --
-1 --

Answer 1

Answer: (2,7) (-2,-9) (3,11) (-3,-13)

Explanation:

(2)(2)+(2)(2)-1 = 7

(2) (-2)+(2)(-2)-1 = -9

(3)(2)+(2)(3)-1 = 11

(-3)(2)+(2)(-3)-1 = -13