Question

(6) If (a?+ba+€2)= 125 and (ab+bc+ca)=
50,find the value of (a+b+c)​

Answer 1

Answer:

+-15

explain :

1. a+b+c=a^2+b^2+c^2+2(ab+bc+ca)
2. =125+2*100
3. =125+100
4. =√225
5. =+-15