You can put this solution on YOUR website! (x^2-16)/x divided by (x+4)/(x+5)
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Invert the denominator and multiply to get:
[(x^2-16)/x] * [(x+5)/(x+4)]
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Factor where you can:
[(x+4)(x-4)/x] * [(x+5)/(x+4)]
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Cancel the common factor: x+4
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= [(x-4)(x+5)]/x
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Cheers,
stan H.