Question

can someone solve it please​

Answer 1

Answer:

ans 1 : Given: a2+b2 +c2 = 35

ab+bc+ca= 23

according to the given equation

(a+b+c)2 = a2+ b2 + c2+ 2 (ab+bc+ca)

(a+b+c)2= 35+ 2(23)

(a+b+c)2 = 35+46= 81

a+b+c = √81=9

ans2 .

a+b+c=p

ab+bc+ca= q

A/Q

(a+b+c)2= a2 + b2 +c2 +2(ab+bc+ca)

p2 = a2 + b2 + c2 + 2q

hence a2 + b2 + c2 =p2 -2q