| __ | 1. | 3*5 + 3*7 | | A. | 3*(5 + 7) | | __ | 2. | 32 + 18 | | B. | 4*(3 + 4) | | __ | 3. | 12 + 16 | | C. | 6*(6 + 8) | | __ | 4. | 36 + 48 | | D. | 9*(1 + 2) | | __ | 5. | 50 + 40 | | E. | 5*2*(5 + 22) |
| __ | 6. | (x + 4)(x - 5) = 0 | | A. | x = -4, x = +5 | | __ | 7. | 5x2 = 0 | | B. | x = 0 (solución doble) | | __ | 8. | x(2x - 4) = 0 | | C. | x = 0, x = +2 | | __ | 9. | x2 - 4 = 0 | | D. | x = +3, x = -3 | | __ | 10. | x2 - 9 = 0 | | E. | x = +2, x = -2 |
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