Question

help me in solving the above question​

Answer 1

Answer:

use the formula............

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Answer 2

Answer

280

Step-by-step explanation:

(a+b)3=(10)3

a3+b3+3ab (a+b) =1000

a3+b3+3.24.10 =1000

a3+b3+720= 1000

a3+b3=1000-720

Ans =280