若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值
问题描述:
若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值
答
|x+3|+|y-2|+|2×z+1|=0
x=-3
y=2
z=-1/2
(x×z-y×z)(y-x+z)
=(-3*(-1/2)-2*(-1/2))(2-(-3)-1/2)
=45/4