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

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

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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, remainder is not equal to  0

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

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