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Mathematics 11 Online
OpenStudy (anonymous):

Any help would be greatly appreciated! =) One zero of the function is given. Find all the other zeros. x^3-3x^2-x-12; zero at 4.

OpenStudy (anonymous):

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

@shrutipande9

jimthompson5910 (jim_thompson5910):

Are you familiar with synthetic division?

OpenStudy (anonymous):

Yes!

jimthompson5910 (jim_thompson5910):

Were you able to get anywhere with synthetic division?

OpenStudy (anonymous):

I'm working on it right now!

OpenStudy (anonymous):

=)

jimthompson5910 (jim_thompson5910):

alright, tell me what you get

OpenStudy (anonymous):

I got (x^3-3x^2+9x-37) with a remainder of 136

jimthompson5910 (jim_thompson5910):

x = 4 is a zero, so you should have gotten a remainder of 0

OpenStudy (anonymous):

Yeah! Sorry I did it wrong! Now I got x^2-7x+27-120/x+4 Is that right?

jimthompson5910 (jim_thompson5910):

First write out the coefficients. Then place the root/zero (4) on the left side in its own box |dw:1389664815029:dw|

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