Which values of xxx satisfy x2−1x2+2x+1≤0\frac{x^2 - 1}{x^2 + 2x + 1} \leq 0x2+2x+1x2−1≤0?
x<−1x < -1x<−1 or x=1x = 1x=1
x≤1,x≠−1x \leq 1, x \neq -1x≤1,x=−1
−1<x≤1-1 < x \leq 1−1<x≤1
x<−1x < -1x<−1