Question 200003
[ (2x^2+5x-12) * (x^2 -3x -10)] / [(x^2 -4x-5) * (x^2-16) ]
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factor  all  quadratics
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[ (2x-3)(x+4) * (x+2)(x-5)] / [ (x+1)(x-5) * (x+4)(x-4) ]
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simplify  by  eliminating  like  terms  in  num  and  den
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[ (2x-3)(x+2) ] / [ (x+1)(x-4) ],,,,,could  stop  here  or multiply factors
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[ 2x^2 +x -6} / [ x^2 -3x -4]