Odpowiedź :
1)
f(x) = x² - 7x + 12
a = 1, b = -7, c = 12
∆ = b² - 4ac
∆ = (-7)² - 4 * 1 * 12 = 49 - 48 = 1
x = (-b - √∆)/2a = (7 - 1)/2 = 3
x = (-b + √∆)/2a = (7 + 1)/2 = 4
2)
y = (x - 3)(x - 4)
3)
W = (p, q)
p = -b/2a = 7/2
q = -∆/4a = -1/4
W = (7/2, -1/4)