Question 560333
Simplify the following expression. 
x^2+x+7/(x-3)(x+4) - (x^2+3)/(x^2+x-12)
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Note x^2+x-12 = (x-3)(x+4) so the denominators are the same.
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Combine the numerators over the commondenominator:
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= [x^2+x+7-x^2-3]/lcd
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= (x+4)/[(x-3)(x+4)]
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= 1/(x-3)
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Cheers,
Stan H.