Integration Partial Fractions Q (2 Viewers)

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What about this one, what's the process for determining partial fractions when the degree of the numerator is greater than or equal to denominator. Where did this A come from?

So in this case since the numerator and denominator is essentially a poly dividing a poly. Since both have equal degree, you can look at the coefficient. By inspection one one value of A can be determined, 3. When it's great or however, simply do a long divide