Check whether 7 + 3x is a factor of 3x3 + 7x
We have to divide 3x3 + 7x by 7 + 3x. If remainder comes out to be 0 then 7 + 3x will be a factor of 3x3 + 7x. By Long Division, As remainder is not zero so 7 + 3x is not a factor of 3x3 + 7x.
