Question

(a+b)^3 prove and a^3+b^3​

Answer 1

Answer:

(a+b)^3=a^3+b^3

Because the power is in both the variables

Answer 2

Answer:

(a+b)³ = a³ + b³

=> a³ + b³ + 3ab(a+b) = a³ + b³

=> 3ab(a+b) = 0

therefore,

3ab = 0 or a+b = 0

=> a+b = 0 ---- (1)

again,

ab = 0

=> a = 0 or b = 0

let us consider, a = 0

from eqn. (1)

0 + b = 0

=> b = 0

it means both a & b are 0

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