`y = (3x - 4)(x^3 + 5)` Use the Product Rule to find the derivative of the function.

Expert Answers
hkj1385 eNotes educator| Certified Educator

`y = (3x-4)*(x^3 + 5)`

`y' = 3(x^2)*(3x-4) + 3(x^3 + 5)`

`or, y' = 9x^3 - 12x^2 + 3x^3 + 15`

`or, y' = 12x^3 - 12x^2 + 15`

`or, y' = 3[4x^3 - 4x^2 + 5]`

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