Question

if a+b =8, b+c=10,c+a=12 find:, (a) a+b+c (b) a(square) +b(square) +c(square)

Answer 1

We have
(a+b)=8,(b+c)=10 and (c+a)=12


i.Adding all we get

a+b+b+c+c+a=8+10+12
2a+2b+2c=30
2(a+b+c)=30
a+b+c=30/2
a+b+c=15 Ans.