equacions de 2n grau (dbb)
| __ | 1. | (3/2)x2=x/2+1 | | A. | x1=1 ; x2=-1 | | __ | 2. | 2x(x-3)+4=0 | | B. | x1=1 ; x2=2 | | __ | 3. | 2x2+2x-6=3x+x2 | | C. | x1=-4 ; x2=2 | | __ | 4. | 5x2-2x-7=0 | | D. | x1=-2 ; x2=3 | | __ | 5. | 6x+5 = -x2 | | E. | x1=0 ; x2=1/2 | | __ | 6. | 6x2-3x=0 | | F. | x1=1 ; x2=-2/3 | | __ | 7. | 9x2+12x+4=0 | | G. | x1=-1 ; x2=-5 | | __ | 8. | x2+4x=6+2x | | H. | x1=-2/3 ; x2=-2/3 | | __ | 9. | x2-1 = 0 | | I. | x1=7/5 ; x2=-1 | | __ | 10. | x2-3x-3 = 0 | | J. | x1=2 ; x2=1 |
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