(2) Reši naslednji enačbi po Vietovem pravilu:
(a) -11q + 2q2 + 5 = 0
(b) 4u2 = 8u
REŠITEV:
(a) 2q2 - 11q + 5 = 0
(2q - 10)(2q - 1) = 0
(q - 5)(2q - 1) = 0
q = 5 ali q = 1/2
(b) 4u2 = 8u
4u2 - 8u = 0
4u(u - 2) = 0
u = 0 ali u = 2