Question

expand (x+5y-6z)^2 using suitable identities plz help me

Answer 1

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Answer 2

Answer:

the identities which can be used is :-

(a+b)^2 = a^2 + b^2 +2ab

(a+b+b)^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca