Question

find roots of polynomial quation
2x^3+2x^2-19x+20=0
please explain

Answer 1

i am not alive

Answer 2

please help

Answer 3

synthetic division

Answer 4

how plz show me

Answer 5

Ever done synthetic before or even long division polynomials?

Answer 6

yes but what do i divide by?

Answer 7

You first try 1. If it comes out with no remainder it is a root. If it doesn't try -1. That is how you start all these problem. It is trial and error, but they make em simple so you can do it.

Answer 8

but in my book the answer says 3+i/2 and -4, how?

Answer 9

That is because someone has tried 1 and -1 and found that there is a remainder. Then on to -4. Try -4, you know it is a root but the synthetic division would give you the rest of the polynomial.