问题
填空题
若x+y=1003,x-y=2,则代数式x2-y2的值是______.
答案
∵x+y=1003,x-y=2,
∴x2-y2=(x-y)(x+y),
=2×1003,
=2006.
故答案为:2006.
若x+y=1003,x-y=2,则代数式x2-y2的值是______.
∵x+y=1003,x-y=2,
∴x2-y2=(x-y)(x+y),
=2×1003,
=2006.
故答案为:2006.