document.write( "Question 1034713: x-3/x^2-x-12 this is on a study guide of mine labeled partial functions and I have no idea where to start! \n" ); document.write( "
Algebra.Com's Answer #649393 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! From \n" ); document.write( " \n" ); document.write( "Now we have to find A and B...multiply everything by (x-4)(x+3) and get \n" ); document.write( "x - 3 = A(x+3) + B(x-4) \n" ); document.write( "x - 3 = Ax + Bx + 3A - 4B = (A+B)x + (3A-4B) \n" ); document.write( "From this we get \n" ); document.write( "A + B = 1 and \n" ); document.write( "3A - 4B = -3 \n" ); document.write( "Multiply the top one by 4 and add it to the bottom one... \n" ); document.write( "3A - 4B = -3 \n" ); document.write( "+(4A + 4B = 4) \n" ); document.write( "------------------- \n" ); document.write( "7A = 1 \n" ); document.write( "A = 1/7 so that \n" ); document.write( "B = 6/7 \n" ); document.write( "which means the partial fractions are \n" ); document.write( "= |