Hej!
Wzory :
y = ax² + bx + c
y = a(x - p)² + q
p = -b/2a
q = -Δ/4a
Δ = b² - 4ac
a)
y = x² + 2x + 3
a = 1, b = 2, c = 3
Δ = 2² - 4 * 1 * 3 = 4 - 12 = -8
p = -2/2 = -1
q = 8/4 = 2
y = (x + 1)² + 2
b)
y = x² - 4x - 2
a = 1, b = -4, c = -2
Δ = (-4)² - 4 * 1 * (-2) = 16 + 8 = 24
p = 4/2 = 2
q = -24/4 = -6
y = (x - 2)² - 6
Pozdrawiam! - Julka
