-3＜x＜2
x-2的绝对值+x+3的绝对值+根号下（x-5）²
=2-x+x+3+│x-5│
=5+5-x
=10-x为啥x-2要变成2-x呢∵-3＜x＜2∴x-2＜0∴│x-2│=2-x