document.write( "Question 1041330: What are the negative and positive intervals to these equations?
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Algebra.Com's Answer #656301 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "1.  y = .\r\n" );
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document.write( "    Find the roots of the polynomial. For it, factorize the polynomial:\r\n" );
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document.write( "     = (x+2)*(x+3).\r\n" );
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document.write( "    So, the roots are x = -3  and  x = -2.\r\n" );
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document.write( "    The polynomial is negative when  -3 < x < -2, i.e in the interval (-3,-2).\r\n" );
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document.write( "    The polynomial is positive when  x < -3  or  x > -2, i.e. in the the union of two semi-infinite intervals  (,) U (,).\r\n" );
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document.write( "2.  Now make the same with the second equation.\r\n" );
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document.write( "    First find its roots (you can use the quadratic formula).\r\n" );
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document.write( "    Then analyse the sign of the polynomial between the roots, to the left of the roots and to the right of the roots.\r\n" );
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