Question

TRUE or FALSE

???

Answer 1

is this statement TRUE or FALSE?

Answer 2

do you have a graphing calculator?

Answer 3

not with me :(

Answer 4

why do i need one?

Answer 5

well you can do it by hand, but it'll take longer

Answer 6

can u pls show me?? idk how to see if it is true or false...

Answer 7

The idea is this

If 4 were an upper bound of the zeros, then all of the zeros would lie below 4 (ie 4 is like the ceiling of where the zeros can go...they can't go higher than 4)

Answer 8

If you somehow found a zero that was above 4, then 4 would NOT be an upper bound because clearly 4 isn't a ceiling

Answer 9

so this statement is FALSE????

Answer 10

i didn't say that

Answer 11

It turns out that the zeros are 3/2, 5/2, -1

All of these values are below 4. So 4 is actually an upper bound

IF we had the zero 10, then 4 would NOT be an upper bound

Answer 12

wait so it is TRUE???

Answer 13

yes, it's actually true

Answer 14

b/c of what u said above right??

Answer 15

yes

Answer 16

thanks :)

Answer 17

thanks :)