问题
填空题
把二元二次方程x2-y2-2x+2y=0化成两个一次方程,那么这两个一次方程分别是______和______.
答案
∵x2-y2-2x+2y=0,
∴(x+y)(x-y)-2(x-y)=0,
∴(x+y-2)(x-y)=0,
∴x+y-2=0或x-y=0.
故答案为:x+y-2=0或x-y=0.
把二元二次方程x2-y2-2x+2y=0化成两个一次方程,那么这两个一次方程分别是______和______.
∵x2-y2-2x+2y=0,
∴(x+y)(x-y)-2(x-y)=0,
∴(x+y-2)(x-y)=0,
∴x+y-2=0或x-y=0.
故答案为:x+y-2=0或x-y=0.