Question

check whether 7+3x is a factor of 3x³+7x​

Answer 1

Let p(x) = 3x³+7x

If (7+3x) is a factor p(-7/3)=0

Now ,

p(-7/3) = 3(-7/3)³+7(-7/3)

= 3(-343/27) -49/3

= -343/9 - 49/3

≠ 0

Therefore,

7+3x is not a factor of p(x)

Answer 2

Hey !

Refer the below attachment !

Thanks !