Question

determine whether (x-3)is a factor of polynomial x³-19x+30

Answer 1

Hope this would help☺

Answer 2

x-3=o
x=3

P(x) =x^3-19x+30
P(3) =(3) ^3-19×3+30
=27-57+30
=-30+30
=0

yes x-3 is the factor of px