Question

Find the value of polynomial 2x+r when xa-3​

Answer 1

Answer:

Given p(x)=2x

2

+x+k

x=3

Put x=3

⇒p(3)=2(3)

2

+(3)+k

⇒2(3)

2

+(3)+k=0

⇒2.9+3+k=0

⇒18+3+k=0

⇒21+k=0

⇒k=−21