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Question

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15xy,-6xy,-3xyand4xy


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Solution

The given pairs of terms 15xy,-6xy,-3xyand4xy are like terms.

So, adding the numerical coefficient of each term.

The sum

=15xy+(-6xy)+(-3xy)+4xy=15xy+4xy+(-6xy)+(-3xy)=19xy+(-6xy)+(-3xy)=19xy-6xy-3xy=19xy-9xy=10xy


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