Question

Expend : (3x - y)³
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Answer 1

Answer:

hi

here is a spam free answer

Explanation:

by using identity (a-b)^3 =(a^3-b^3-3a^2b+ab^2)

( 3 x )^3 -( 2y)^3 -3(3x)^2(2y)+3(3x)(2y)^2

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

Answer 2

Answer:

try binomial theorem

Explanation:

refer from your text book