|x^2 - 1| < 3 tolong bantu pakai cara dan rumus jika ada

x² - 1 < 3
x² < 3 + 1
x² < 4
x < √4
x < 2

| x² - 1 | < 3
-3 < x² - 1 < 3
-3 + 1 < x² < 3 + 1
-2 < x² < 4

x² > -2
x² = -2
x = tdk ada yg mmnuhi

x² < 4
x² = 4
x = 2 atau x = -2

Maka,
Hp = {-2 < x < 2}