Question

write the following in expanded form:(1-3/4y)^3​

Answer 1

We know that

(a−b)

3 =a 3 −b 3 −3ab(a−b)

Therefore,

(5x−3y) 3=(5x)

3

−(3y)

2

−3×5x×3y(5x−3y)

(5x−3y)

3

=125x

3

−27y

3

−45xy(5x−3y)

(5x−3y)

3

=125x

3

−27y

3

−225x

2

y+135xy

2

Hence, this is the answer.