Identitats notables
| __ | 1. | (3x+2)(3x-2) | | A. | x2+8x+16 | | __ | 2. | (3x+2)2 | | B. | x2-8x+16 | | __ | 3. | (4x-5)(4x+5) | | C. | x2-25 | | __ | 4. | (4x-5)2 | | D. | 9x2+12x+4 | | __ | 5. | (5x3-7)2 | | E. | x2-16 | | __ | 6. | (7x2-5)2 | | F. | 16x2-25 | | __ | 7. | (x+4)(x-4) | | G. | 16x2-40x+25 | | __ | 8. | (x+4)2 | | H. | 9x2-4 | | __ | 9. | (x+5)(x-5) | | I. | 49x4-70x+25 | | __ | 10. | (x-4)2 | | J. | 25x6-70x3+49 |
| __ | 11. | (3x-6)2 | | A. | 9x2-36x+36 | | __ | 12. | (3x5-9)(3x5+9) | | B. | 36x2+36x+9 | | __ | 13. | (5x2-9)2 | | C. | 36x2-4 | | __ | 14. | (6x+3)2 | | D. | 9x10-81 | | __ | 15. | (6x-2)(6x+2) | | E. | 25x4-90x2+81 | | __ | 16. | 9x8-64 | | F. | (4x-3)2 | | __ | 17. | 16x2-24x+9 | | G. | (7x+1)2 | | __ | 18. | 16x4+40x2+25 | | H. | (3x4-8)(3x4+8) | | __ | 19. | 25x4-30x2+9 | | I. | (5x2-3)2 | | __ | 20. | 49x2+14x+1 | | J. | (4x2+5)2 |
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