Math, asked by niloafr, 1 year ago

plz answer me .....

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Answered by user944

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In this , we will use the middle term split ;

=x4 - 18x2y2 + 81y4

=x4 -9x2y2 - 9x2y2 + 81y4

=x2(x2 - 9y2) - 9y2(x2 - 9y2)

=(x2 - 9y2) (x2 - 9y2)

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