V. En cada producto notable, encontrar el error o los errore 1. (x-7)(x+7)= x²+49 2. (x 3. (x+6)²= x²+6x+36 4. (4 5. (a-9)²=a²-18a+ 18 6. (5 7. (2x+12)² = 4x²+24x+144 8. ( 9. (x+5)(x-7)= x²-12x-35 10. ( 11. (x+3)³ = x³ +9x-27+27 12. ( 14. ( 2 13. (2x+4) x²+8x+16​