document.write( "Question 759840: Express the solution to the following inequality using interval notation.
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document.write( "x^2 + 7x - 18 ≥ 0 \n" );
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Algebra.Com's Answer #470507 by tommyt3rd(5050)![]() ![]() You can put this solution on YOUR website! x^2+7x-18= \n" ); document.write( "(x+9)(x-2)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "and since a=1 (a>0) we know that it opens upwards.\r \n" ); document.write( "\n" ); document.write( "this implies that it is negative on (-9,2) \n" ); document.write( "therefore our solution is...\r \n" ); document.write( "\n" ); document.write( "(-oo,-9]U[2,oo) \n" ); document.write( " |