if a square + b square + c square is equals to 20 and a + b + c = 0 find a b + BC + CA
Answers
Answered by
2
hope this answer might help you
Attachments:
vini58:
bro how it comes -10
since a+b+c=0 take 20 left side so -20
when 0 square= 20 + 2(ab+bc+ca)
haa thats it
-20=2(ab+bc+ca)
thank you verry much bro
Similar questions