Question

f(x)=x2-3x-7 find f(-3)

a- -7
b- 8
c- 11
d- 22

Answer 1

This is so easy

Answer 2

f(x) = x^2 -3x - 7
f(3) = 3^2 - 3(3) - 7 = ....

Answer 3

f(3) simply means everywhere you see x, replace it with 3

Answer 4

then evaluate

Answer 5

thanks bro

Answer 6

wait

Answer 7

it's f(-3), not f(3)

Answer 8

f(-3) = -3^2 -3(-3) - 7
= 9 + 9 - 7 = 11

Answer 9

The answer is c

Answer 10

oh thanks man, i am puting another question if you can take a look to it

Answer 11

But try to solve it yourself first, then get to the part you are stuck on, then only post that part.