Question

V. If a + b c = 7 and ab- bc - ca = 14
, find the value of a^2 +b^2 +c^2​

Answer 1

Answer:

1=7 and abcb=7 into2ab

Answer 2

a+b−c)2=a2+b2+−c2+2ab−2bc−2ac72=a2+b2+c2+2(ab−bc−ac)49=a2+b2+c2+2(14)a2+b2+c2=49−18a2+b2+c2=31