Question

Evaluate the function for the given value of X
f(x)=x+3 when x=-3

Answer 1

Everytime you get a question like this, substitute every x for the number you got to evaluate, in this case -3.

so we say f(-3) = (just put -3 where you have a x) and you get :\[f(-3) = -3+3 = 0\]

Answer 2

thanks :) but what if it was f(x)=x squared -3x when x=3

Answer 3

3^2=9
f(9)=9+3=12

Answer 4

no, you will get :\[3^2 -3\times3 = 9 - 9 = 0\]

Answer 5

-3 times 3 is -9 because a negative number times a positive number is negative. Remember opposite signs means the result is negative. Same signs means its positive.

Answer 6

oh my bad I thought the same obvious equation

Answer 7

okay lets do one together f(x)= |x-2| when x=5
whats the best way to start?

Answer 8

I5-2I=I3I=3