Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.5 - Page 74: 82

$y$($y^{4}$ - 16) = y($y^{2}$ + 4)($y^{2}$ - 4)

To factor this polynomial, start by looking for the greatest common factor between both terms. Since the GCF has already been found for the first term, we must apply the formula A^2 - B^2 = (A + B)(A - B) to the second term. The result will create three different terms and is the final answer.