Math, asked by vini58, 1 year ago

if a square + b square + c square is equals to 20 and a + b + c = 0 find a b + BC + CA

Answers

Answered by Anudeep1999

hope this answer might help you

Attachments:

vini58: bro how it comes -10

Anudeep1999: since a+b+c=0 take 20 left side so -20

vini58: when 0 square= 20 + 2(ab+bc+ca)

Anudeep1999: haa thats it

Anudeep1999: -20=2(ab+bc+ca)

vini58: thank you verry much bro

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