(X-3)的平方与|X+Y-1|互为相反数,求XY的值
问题描述:
(X-3)的平方与|X+Y-1|互为相反数,求XY的值
答
∵互为相反数
∴x-3=0
x=3
x+y-1=0
y=-2
xy=3*-2
=-6