Equacions de 2n grau completes
| __ | 1. | 2x2+3x+2=0 | | A. | x1=3 i x2=2 | | __ | 2. | 2x2+x-6=0 | | B. | No hi ha cap solució, discriminant -16 | | __ | 3. | 3x2+6x-45=0 | | C. | x1=4 i x2=1 | | __ | 4. | 3x2=-5x-3 | | D. | No hi ha cap solució, discriminant -7 | | __ | 5. | x2+2x+5=0 | | E. | x1=-5 i x2=-4 | | __ | 6. | x2+20=-9x | | F. | x=3 només una solució | | __ | 7. | x2+x=6 | | G. | x1=-3 i x2=2 | | __ | 8. | x2-5x+4=0 | | H. | No hi ha cap solució, discriminant -11 | | __ | 9. | x2-5x+6=0 | | I. | x1=-2 i x2=3/2 | | __ | 10. | x2-6x+9=0 | | J. | x1=3 i x2=-5 |
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