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Question

Find the numerical value of the following expression:

4xy-5x2y2+4x3y3 if x=3 and y=4


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Solution

Given expression 4xy-5x2y2+4x3y3

Put x=3 and y=4 in the given expression:

4xy-5x2y2+4x3y3=434-53242+43343

=434-53242+43343

=48-5916+42764

=48-720+6912

=5520

Hence the numerical value of expression is 5520.


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