x² - 1,  kun  x ≤ -1

x² - 1,  kun  x ≥ 1

-x² + 1,  kun  -1 < x < 1

y = x² - 1  (ilman itseisarvoja)

f(x)=\left\vert  x^2-1\right\vert 

y = x^{2}-1

f(x) = x^(2) - 1
g = Function(x^(2) - 1, -Infinity, -1)
h = Function(x^(2) - 1, 1, Infinity)
p = Function(-x^(2) + 1, -1, 1)
a = false
b = false
c = false
d = false