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Question

What are the common factors of 3x3y, 5xy2 and 15xy ?


A

x, y, xy, xy2, x3y

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B

x, y, xy, x2y

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C

x, y, xy

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D

xy, x2y, xy2

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Solution

The correct option is C

x, y, xy


We can write the given terms as follows
3x3y=3×x×x×x×y
5xy2=5×x×y×y
15xy=15×x×y
The common irreducible factors in all three terms are x and y.
So, the common factors of the given expressions are x, y and xy.


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