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)\"\" \"About 
You can put this solution on YOUR website!
From
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\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( "= \"%281%2F7%29%2F%28x-4%29+%2B+%286%2F7%29%2F%28x%2B3%29\"
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