document.write( "Question 29745: What values for x must be excluded in the following fraction?\r
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document.write( "x+2/x^2-9x+14\r
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document.write( "Thank you. \n" );
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Algebra.Com's Answer #16483 by sdmmadam@yahoo.com(530)![]() ![]() ![]() You can put this solution on YOUR website! (x+2)/(x^2-9x+14) \n" ); document.write( "=(x+2)/[(x-7)(x-2)] (by factorisation of the dr) \n" ); document.write( "Note: If the problem is \n" ); document.write( "(x-2)/(x^2-9x+14) \n" ); document.write( "=(x-2)/[(x-7)(x-2)] \n" ); document.write( "=1/(x-7) (canceling (x-2) ) \n" ); document.write( "Note: (x^2-9x+14) is a quadratic expression \n" ); document.write( "and the middle term is splittable into two parts \n" ); document.write( "(-7x) and (-2x) so that their sum is the middle term \n" ); document.write( "and their product is the product of the square term and the constant term. \n" ); document.write( "Here (-9x) = (-7x)+(-2x) and (-7x)X(-2x) = 14x^2 = (x^2)X(14) \n" ); document.write( "(x^2-9x+14) \n" ); document.write( "=x^2-7x-2x+14 \n" ); document.write( "=(x^2-7x)-2x+14 \n" ); document.write( "=x(x-7)-2(x-7) \n" ); document.write( "=xp-2p where p = (x-7) \n" ); document.write( "=p(x-2) \n" ); document.write( "=(x-7)(x-2) \n" ); document.write( " |