Answer: 16yy ; or, write as: 16y y .
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Explanation:
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Refer to the following "laws", or "properties", of exponents:
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1) (xy)ⁿ = xⁿ yⁿ ;
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2) (aᵇ)ⁿ = a⁽ᵇⁿ ⁾ ;
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→ So; (4y)² = 4² y² = 16 y² = 16yy ; or, write as: 16yy .
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