x的平方减2x减3≤0求解

2025-05-13 21:31:14
推荐回答(2个)
回答1:

原式=(x-3)(x+1)≤0,所以-1≤x≤3

回答2:

x^2-2x-3<=0
(x-3)(x 1) <=0
-1<=x<=3