Question

STUDENTS SOLVE IT

LETZZZ SEE WHO WINS

Answer 1

Hey     .      (a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ca) 15^2=a^2+b^2+c^2+2(100) 225=a^2+b^2+c^2+200         a^2+b^2+c^2=225-200=25    Thank yoy  Jay hind  

Answer 2

put it in formula

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

(15)2=(a2+b2+c2+2(100)

225=(a2+b2+c2+200)

225 =a2+b2+c2+200

=a2+b2+c2=225-200

= 25

hope it clarifies ur doubt dear friend..