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formule matematica
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Trinomul patrat
1. Ecuatia patrata ax2 + bx+ c = 0, a 6= 0 area) doua solutii distincte, daca = b2 4ac > 0
x1 =b
2a, x2 =
b+2a
;
b) doua radacini egale, daca = 0, x1 = x2 = b2a ;c) nu are solutii, daca < 0.
Cazuri particulare
1. ax2 + 2kx+ c = 0, a 6= 0, x1,2 = k k2 aca
(k2 ac 0).
2. x2 + px+ q = 0, x1,2 = p2 (
p
2
)2 q, daca p2 4q.
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