Question

Check whether 7+ 3x is a factor or 3x cube + 7x by remainder theorem

Answer 1

Answer:

Apply remainder theorem

7+3x=0

3x=−7 or x=

3

−7

Replace x=

3

−7

in the equation, we get

3x

3

+7x =3(

3

−7

)

3

+7(

3

−7

)

=3(

27

−343

)−

3

49

=

9

343

−

3

49

This value is not equal to zero then 7+3x is not a factor of

3x

3

+7x