Question

已知绝对值a等于2,绝对值b等于3,求a+b的值

Answer 1

|a|=2,a=2或a=-2 |b|=3,b=3或b=-3 a=2,b=3,a+b=5 a=2,b=-3,a+b=-1 a=-2,b=3,a+b=1 a=-2,b=-3,a+b=-5