Question

plzz tell me the answer ​

Answer 1

Using the identity (a−b)

3

=a

3

−b

3

−3ab(a−b)

It is given that a−b=3 and ab=10, therefore,

(a−b)

3

=a

3

−b

3

−3ab(a−b)

⇒(3)

3

=a

3

−b

3

−(3×10)(3)

⇒27=a

3

−b

3

−(30×3)

⇒27=a

3

−b

3

−90

⇒a

3

−b

3

=27+90

⇒a

3

−b

3

=117

Hence, a

3

−b

3

=117.

Answer 2

Answer:

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