Question

expand using suitable identities (a-2/3 b)^3

Answer 1

Step-by-step explanation:

We need to expand (2a−3b)

3

We know suitable identity is (x−y)

3

=x

3

−3x

2

y+3xy

2

+y

3

Here x=2a and y=3b

Therefore, value of (2a−3b)

3

is

=(2a)

3

−3(2a)

2

(3b)+3(2a)(3b)

2

−(3b)

3

=8a

3

−36a

2

b+54ab

2

−27b

3

Answer 2

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