document.write( "Question 1159538: check whether 7+3x is a factor of 3x^3 + 7x \n" ); document.write( "

Algebra.Com's Answer #782595 by ikleyn(52817) $\"\"$ $\"About$

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document.write( "Had the binomial (7+3x) been a factor of the polynomial  p(x) = . then \r\n" );
document.write( "the number  x= -  would be the zero of the polynomial p(x).\r\n" );
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document.write( "But you can easily check on your own, that   p(-7/3)  is not equal to zero.\r\n" );
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document.write( "This contradiction  PROVES  that   7+3x  IS NOT  the factor of 3x^3 + 7x.\r\n" );
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