Final answer:
The Commutative Property justifies the given statement.
Step-by-step explanation:
The property that justifies the statement (2x + y2)z3 = (y² + 2x)z³ is the Commutative Property of Addition. According to this property, the order of the numbers being added does not affect the sum. In this case, the expression (2x + y2)z3 can be rearranged as (y² + 2x)z³ and still yield the same result.
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