Question

expand (2x-3y)³ by using suitable identity​

Answer 1

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Answer 2

Answer:

8x^3 - 27y^3 - 36 x^2y + 54 xy^2

Step-by-step explanation:

from (a - b)^3 = a^3 - b^3 - 3ab ( a - b )

(2x-3y)³= (2x)^3 - (3y)^3 - 3* 2x * 3y (2x - 3y)

= 8x^3 - 27y^3 - 18 xy (2x - 3y)

= 8x^3 - 27y^3 - 36 x^2y + 54 xy^2