Answer:
C) 15x^3y^3
Explanation:
5 x 3 is 15
5xy^2 has 1 x and 3yx^2 has 2. 1x + 2x=3x
5xy^2 has 2 y. 3yx^2 has 1. 2y + 1y = 3y.
Therefore it is C
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