You can put this solution on YOUR website! Determine the vertical asymptotes of f(x) = (4x – 20) / (4x + 12)
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You could factor to simplify but it is not necessary to find the VA.
You have a VA when 4x+12 = 0 and 4x-20 is not zero.
4x+12 = 0
x = -3 is where you have a VA.
Note that the numerator is not zero when x = -3
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Cheers,
Stan H.