對唔住 唔係好明點分段solve 你指 -2<x<2 分段?yes 分開 x ≤ -2, x ≥ 2, -2 < x < 2 睇下有咩solution, 再check個solution (如有) 係咪out of range
對唔住 唔係好明點分段solve 你指 -2<x<2 分段?