document.write( "Question 346182: a^3-2a^2-4a-8=0\r
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document.write( "How would I solve this? \n" );
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Algebra.Com's Answer #247565 by CharlesG2(834)![]() ![]() ![]() You can put this solution on YOUR website! a^3-2a^2-4a-8=0\r \n" ); document.write( "\n" ); document.write( "How would I solve this?\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you sure that it is not a^3 + 2a^2 - 4a - 8 = 0? \n" ); document.write( "if it was: \n" ); document.write( "(a + 2)(a^2 - 4) = 0 \n" ); document.write( "using FOIL: \n" ); document.write( "a^3 - 4a + 2a^2 - 8 = 0 \n" ); document.write( "rearranging \n" ); document.write( "a^3 + 2a^2 - 4a - 8 = 0\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "then: (a + 2)(a^2 - 4) = 0 \n" ); document.write( " (a + 2)(a + 2)(a - 2) = 0\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "then a = -2 (twice) and a = 2 \n" ); document.write( " \n" ); document.write( " |