Question

math problem

Answer 1

its f(3) @AZ

Answer 2

so which equation do we use?

the second or the third one?

remember the second one is for when x is LESS THAN 3
and the third one is for when x is GREATER THAN OR EQUAL to 3

and in this question, we're looking at x = 3

Answer 3

third one?

Answer 4

Good! So plug in x = 3 and what do you get?

(3)^2 - 1 = ??

Answer 5

9-1=8

Answer 6

and so that's your answer!

f(3) just means what is the y-value when x = 3