Math, asked by Komalpreetkaurjoti, 1 year ago

if a2+b2+c2=20 and a+b+c=0,find ab+bc+ca.

Anonymous: hiiii komal

Anonymous: i dont understand ur question

mishrakashish54: Do you mean a square where it is written a2

Komalpreetkaurjoti: yes

Komalpreetkaurjoti: hlo

Anonymous: hllo

Answers

Answered by Anonymous

hey your ans is here

________
given
a2+b2+c2=20
a+b+c=0

to find
Ab+BC+ca
now

apply the identity
(a+b+c)^2=a2+b2+c2+2(Ab+BC+ca)
(0)2=20+2(Ab+BC+ca)
-20/2=Ab+BC+ca
-10=Ab+BC+ca
______

Komalpreetkaurjoti: thankyou so much

Previous Question

Next Question