Question

已知/x-2/+(3x-y+m)^2=0,求当M为何值时y大于或等于0?m为何值时,y

Answer 1

|x-2|+(3x-y+m)^2=0

两个非负数的和等于零,两个数均为0

x-2=0,3x-y+m=0

x=2,y=6+m

y≥0

6+m≥0

m≥-6

y