Question

已知丨x丨=3,丨y丨=2,求x+y的绝对值

Answer 1

丨x丨=3,丨y丨=2,则有

(1)x=3,y=2,x+y=5

(2)x=-3,y=2,x+y=-1

(3)x=3,y=-2,x+y=1

(4)x=-3,y=-2,x+y=-5