Question

apply the quadratic formula to find the roots of the given function, and then graph the function
f(x)=y^2-9
please show work for credit

Answer 1

OM goodness! :/

Answer 2

lol

Answer 3

thats what i said

Answer 4

ha ah.. Hey, are you sure that's written correctly? :/

Answer 5

usually it's f(x) = x^2 - 9

Answer 6

not y^2 - 9

Answer 7

f(x) = x^2 - 9

Answer 8

ok, soooooo. huh... I guess f(x) = x?? lol

Answer 9

i am having problems figuring out a b c for the formula

Answer 10

weird. then it should be f(y) = y^2 -9 because we are dealing with a function of y

Answer 11

it is changed to x

Answer 12

f(x) = x^2 - 9

Answer 13

AND there is no need to use the quadratic because you can factor this!

x^2 - 9 = x^2 - 3^2 = (x+3) (x-3)

so x is simply plus or minus 3!

use the quadratic? for what! lol

Answer 14

finding the roots

Answer 15

well, the roots are -3 and 3 but anywyay with the quadratic you want to use

(1)x^2 + 0x - 9

a = 1
b = 0
c = -9

Answer 16

ok now I think I got it from there