Odpowiedź:
y = 3x² - 9x - 30
a = 3 , b = - 9 , c = - 30
Δ = b² - 4ac = (- 9)² - 4 * 3 * (- 30) = 81 + 360 = 441
p = - b/2a = 9/6 = 1 3/6 = 1 1/2
q = - Δ/4a = - 441/12 = - 36 9/12 = - 36 3/4
Postać kanoniczna
y = a(x - p)² + q = 3(x - 1 1/2)² - 36 3/4
