Question

WILL MEDAL for correct answer
How many zeros should f(x) = (x – 1)(x – 8)(x + 7) have?
http://prntscr.com/cttrae

Answer 1

zeros,roots, or when f(x)=0- how many answers of x exists

Answer 2

3?

Answer 3

yes but why

Answer 4

http://prnt.sc/ctugzj
is that right?

Answer 5

well sort of,
but this is only because it is in factored form and each x happens to be a different solution

but if i gave you something that looked like \[f(x)=(x-1)(x-1)(x-1)\]
it would only have 1 root, because there is only 1 solution for x when f(x)=0

Answer 6

okay, that makes sense. Thanks a lot!!!