若a-b=12,a-c=1,则(2a-b-c)^2+(c-b)^2的值为?
若a-b=12,a-c=1,则(2a-b-c)^2+(c-b)^2的值为?
参考答案:(2a-b-c)^2+(c-b)^2
=(a-b+a-c)^2+[(a-b)-(a-c)]^2
=(12+1)^2+(12-1)^2
=13^2+11^2
=169+121
=290
若a-b=12,a-c=1,则(2a-b-c)^2+(c-b)^2的值为?
参考答案:(2a-b-c)^2+(c-b)^2
=(a-b+a-c)^2+[(a-b)-(a-c)]^2
=(12+1)^2+(12-1)^2
=13^2+11^2
=169+121
=290