Cancelling down

[mathshelpplease]

I need to get from the first to the second fraction, but am finding cancelling down impossible. How should I approach this?

 

[Steven G]

Factor out what is common in the numerator and get a common denominator.

 

[mmm4444bot]

finding cancelling down impossible

Hello. That second fraction looks like the derivative that you said you'd worked out yesterday. (You'd checked it online.) Is this thread a continuation of the same exercise?

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