Odpowiedź:
f(x) = - 1/2x² + 5/4x - 1/2
a = - 1/2 , b = 5/4 , c = - 1/2
Δ = b² - 4ac = (5/4)² - 4 * (- 1/2) * (- 1/2) = 25/16 - 4 * 1/4 = 25/16 - 1 = 9/16
W = (p , q)
p = - b/2a = - 5/4 : {2 * (- 1/2)] = - 5/4 : (- 1) = 5/4 * 1 = 5/4
q = - Δ/4a = - 9/16 : [ 4 * (- 1/2)] = - 9/16 : (- 2) = - 9/16 * (- 1/2) =
= 9/16 * 1/2 = 9/32
W = (5/4 ; 9/32)
