# Q3. Check whether $7 + 3x$ is a factor of $3x^3 + 7x.$.

R

When we divide  $3x^3 + 7x$  by  $7 + 3x$

We can also write  $3x^3 + 7x$  as  $3x^3 +0x^2+ 7x$

By long division method, we will get

Since the remainder is not equal to  0

Therefore,  $7 + 3x$  is not a factor of  $3x^3 + 7x$

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