Question 731473
the value of expression  {{{x^2 + y^2 + z^2 -xy -yz- zx}}} ,if {{{x= 97}}} ,{{{y =98 }}}, {{{z=99}}} will be


{{{97^2 + 98^2 + 99^2 -97*98 -98*99- 99*97}}}


={{{9409 + 9604 + 9801 -9506 -9702- 9603}}}

={{{9409 + 9604 + 9801 -(9506 +9702+ 9603)}}}

={{{28814 -28811}}}

={{{3}}}