Math, asked by Dayana3, 1 year ago

expand ( 7 - 3 xy )^3

Answers

Answered by rakshit9269

1

(a-b)^3=a^3+b^3+3ab(a+b)
here a=7
b=3xy
then
343+27x^3y^3+63xy(7+3xy)

Answered by prasenjit20

1

(7-3xy)^3 =7^3-3×7^2×3xy+3×7×9x^2y^2-3^3x^3y^3
=343-441xy+189x^2y^2-27x^3y^3

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