1 Answers
x3 + y3 +9xy
= {( x + y )3 -3xy ( x+y )}+9xy
= 33 -3xy. 3 + 9xy
=33 - 9xy + 9xy
= 27 (Ans.)
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Answered
x3 + y3 +9xy
= {( x + y )3 -3xy ( x+y )}+9xy
= 33 -3xy. 3 + 9xy
=33 - 9xy + 9xy
= 27 (Ans.)