1.

Isn't it + 2ab??? as (a+b)^2 = a^2 + 2ab + b^2​

Answer»

Step-by-step EXPLANATION:

(a + b)^{2} - 2ab

= (a^{2} + b^{2} + 2ab) - 2ab

= a^{2} + b^{2}

HENCE,

a^{2} + b^{2} = (a + b)^{2} - 2ab



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