Question

Answer please fast with full explain​

Answer 1

Step-by-step explanation:

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

p^2= a^2+b^2+c^2+2q

a^2+b^2+v^2= p^2-2q

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Answer 2

It is p^2 - 2q

Here use the identity (a+b+c)^2= a^2 + b^2 + c^2 + 2(ab + bc + ca)
Putting values,
p^2 = a^2 + b^2 + c^2 + 2q
p^2 - 2q = a^2 + b^2 + c^2

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