A = half m + 1, B = half m + 2, C = half m + 3, find a ^ 2 + 2Ab + B ^ 2-2ac + C ^ 2-2bc
a+b-c
=1/2m+1+1/2m+2-1/2m-3
=1/2m
a^2+2ab+b^2-2ac+c^2-2bc
=(a+b)^2-2(a+b)c+c^2
=(a+b-c)^2
=(1/2m)^2
=(1/4)m^2
RELATED INFORMATIONS
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