SOLUTION: If x+y+z=12,x2+y2+z2=64,find xy+yz+zx

SOLUTION: If x+y+z=12,x2+y2+z2=64,find xy+yz+zx

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Question 1037398: If x+y+z=12,x2+y2+z2=64,find xy+yz+zx
Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
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If x+y+z=12, x2+y2+z2=64, find xy+yz+zx
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Use   -  = .


It gives   -  = ,  or


 =  = 40.


Answer.  40.

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