Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


There is an identity where (x+y+z)=x^2+y^2+z^2 +2xy+2yz+2zy
substituting the values
(10)^2=40+2(x^2+y^2+z^2 +2xy+2yz+2zy)
60=2(x^2+y^2+z^2 +2xy+2yz+2zy)
(x^2+y^2+z^2 +2xy+2yz+2zy)=30
option B is correct

3 3 3
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts