# Chapter 5 - Review: 110

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

#### Work Step by Step

16 - $y^{4}$ = (4 + $y^{2}$)(4 - $y^{2}$) Check by multiplying factors with FOIL: 4(4) + 4(-$y^{2}$) + $y^{2}$(4) + $y^{2}$(-$y^{2}$) = 16 - 4$y^{2}$ + 4$y^{2}$ - $y^{4}$ = 16 - $y^{4}$

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