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This PDF document contains quadratic equations and their solutions. The document includes examples and exercises for students to solve. It is likely a worksheet or a part of a secondary school mathematics curriculum.

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Ecuatia de gradul II Forma generala a ecuatiei de gradul al doilea este : a x 2 +b x +c = 0 ; b  Calculam delta,   b2  4  a  c ; Solutiile ecuatiei sunt date de formula: x1,2 ...

Ecuatia de gradul II Forma generala a ecuatiei de gradul al doilea este : a x 2 +b x +c = 0 ; b  Calculam delta,   b2  4  a  c ; Solutiile ecuatiei sunt date de formula: x1,2  2a Daca  >0, ecuatia are 2 solutii reale diferite. Daca  =0, ecuatia are 2 solutii reale egale. Daca  0 , deci 9-16m>0, de unde 9>16m, m<. 16 Tema Rezolvati ecuatiile : 1) x 2  5x  6  0. 2) x 2  2 x  3  0 3) x 2  9  0 4) x 2  4  0 5) x 2  6 x  9  0 6) 2 x 2  5x  2  0 7) Determinati m  R , astfel incat ecuatia x 2  mx  4  0 sa aiba 2 solutii reale egale. 8) Aratati ca ecuatia x 2  2 x  1  m2  0 nu are solutii reale, pentru orice valori ale lui m., nenule

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