which of the following are roots of the following polynomial f(x)=x3-5x2-13x-7

Question

misty1212 · Answer

HI!!

misty1212 · Answer

math teachers usually make this easy
1 does not work because $$f(1)=1-5-13-7\neq 0$$

misty1212 · Answer

the next good guess is to try $$f(-1)=-1+5+13-7$$

misty1212 · Answer

oops mistake there $$f(-1)=-1-5+13-7$$

misty1212 · Answer

got it on the second try !!

mathmale · Answer

I see you are trying to answer Dude's question with synthetic division, but have you checked yet whether or not he has studied that before?   You might need to explain some preliminaries first.

mathmale · Answer

Your goal should be to help DUDE get his own answer, not to provide him with the answer.

misty1212 · Answer

??
no synthetic division was harmed in computing the number
just plug in and see what you get

misty1212 · Answer

but thanks for your input ...

mathmale · Answer

Sorry to spill cold water on your fun, but your responses are unacceptable.  I am a Moderator and as such it's my job to see that users adhere to OpenStudy rules.
Stop now, or risk suspension.

misty1212 · Answer

not sure exactly what the "goal" is since @dude1152 is off line

misty1212 · Answer

guess it must have been that "synthetic division" that was "unacceptable" lol