(X+Y-3)方乘(X-Y+5)方=0那么得多少
问题描述:
(X+Y-3)方乘(X-Y+5)方=0那么得多少
X方-Y方得多少
答
(X+Y-3)方乘(X-Y+5)方=0
(X+Y-3)方=0
(X-Y+5)方=0
X+Y=3
X-Y=-5
2x=-2
x=-1
y=3-x=3-(-1)=4