Question

if p(-3) =0 then what is a factor of a polynomial​

Answer 1

it can be x²+x-6

see here

p(-3) = x²+x-6

x²+x-6

= (-3)²+(-3)-6

= 9-3-6

= 9-9

= 0

therefore x²+x-6 is the factor of the polynomial