Level
pending

*a, b, c, d* fulfill the condition that\[(ab+cd)^{2}+(ad-bc)^{2}\]=2009 .Find out all the possible sum values of \[a^{2}+b^{2}+c^{2}+d^{2}\]Sum up all the possible values for this problem and write out the last three digits of this sum as the answer.

×

Problem Loading...

Note Loading...

Set Loading...