Question

Q.1.Verification of the identity (written above)☝☝
Solve plz​

Answer 1

Answer:

$(a + b + c)^{2} = \\ \\ let \: (b + c) = x \\ \\ \\ (a + x)^{2} = {a }^{2} + {x}^{2} + 2ax \\ \\ \\ a ^{2} + (b + c) ^{2} + 2a(b + c) \\ \\ = {a}^{2} + {b}^{2} + {c}^{2} + 2bc + 2ab + 2ac$

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