Question

pls give me the solution

Answer 1

this is the ans by using factor theorem

Answer 2

Let the given polynomial be p(x)=2x²+x +k
according to factor theorum, If (x-3) is a factor of p(x), Then p(3)=0

p(3)=2(3)²+(3)+k=0

2(3)²+3+k=0

18+3+k=0

21+k=0

k=-21

Therefor K will be equal to -21