document.write( "Question 731473: the value of expression x^2 + y^2 + z^2 -xy -yz- zx ,if x= 97 ,y =98 , z=99 \n" ); document.write( "
Algebra.Com's Answer #447142 by lokesh mishra(5)\"\" \"About 
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x^2 + y^2 + z^2 -xy - yz- zx = 1/2{(x-y)^2 + (y-z)^2 + (z-x)^2 } \r
\n" ); document.write( "\n" ); document.write( "= 1/2{(97-98)^2 + (98-99)^2 + (99-97)^2 } = 1/2 ( 1 + 1 + 4 ) = 6/2 = 3
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