Question

a+b+c= p
ab+bc+ca= q
find: a² + b² + c²​

Answer 1

Answer:

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Answer 2

Answer:

p^2 -2q

Step-by-step explanation:

(a+b+c)^2=(a^2+b^2+c^2) + 2(ab+bc+ac) .......equation 1

a+b+c=p

ab+bc+ac=q ( sub in equation 1)

so, p^2-2q=a^2+b^2+c^2