xyz满足(2x+1)^2+(3-y)^2+丨z+3丨等于0 求代数式(z-x)^y的值
满足 2x+1 = 0 3-y = 0 z+3 = 0
x= -1/2 y=3 z= -3
(z-x)^y的值
= ( -3 +1/2 ) ^ 3
= ( - 5/2 ) ^ 3
= - 125/ 8