I, Resolver cada suma por diferencia 1. (x-2) (x+ 2). 2. (a+ 3) (a- 3) $3.\left(2x-\right)\left(2x+5\right)$ 4. (3x+ 2) (3x- 2) 5. (3x+ y) (3x-N) 6. (5x- 2) (Sx+ 2) $7.\left(7a-b\right)$ $7a+b\right)$ $8$ $\left(5x+10\right)\right)\left(5x-10y\right)$ 2 (5x - 3) (5x + 3) $10.\left(7a^{2}+2b\right)$ $7a^{2}-2b\right)$ IL Resolver cada cuadrado de binomio 1(. x+ 4 2. (3++ 2) 3. (a+1) 4. (+5q 5. (a+ 2b) 6. 7(. Sx+ 3y) 8. (a- 36) 9 ((6x--5 x) 10. (6x- Syy 11. -5) 12. (3a" +) III Resolver cada producto 1. (x-2) (x+1) 2. (a+ 3) (a- 2) 3. (2a-3) (a+ 3) 4. (4x+ 2) (- 5) $s$ $\left(5x-2\right)\left(5x+2\right)$ $6.\left(3x+2\right)\left(3x-2\right)$ $7$ $\left(4a-b\right)\left(3a+b\right)$ 8. (2x+ 5y) (5x+ y) 9. (2-1) (3x- 3) 10. (x- 3)' $11$ $\left(7a^{2}-b\right)\left(3a-2b\right)$ 12. (a+ 2) IV. En cada producto notable, encontrar el error o los errores 1. (x- 7) (1+ 7) = r+ 49 $2$ $\left(x-8\right)^{2}=x^{2}+16x-64$ $3$ $\left(x+6\right)^{2}=x^{2}+6x+3$ $4$ $\left(4x+2\right)\left(4x-2\right)=4x^{2}-4$ $s.\left(a-9\right)^{2}=a^{2}-18a+18$ $6$ $\left(5x-2\right)\left(5x-2\right)=25x^{2}-4$ $7.\left(2x+12\right)^{2}=4x^{2}+24x+144$ 8. (2r+ $3y\right)\left(3x+2y\right)=6x^{2}+6y$ 9. $\left(x+5\right)\left(x-7\right)=x^{2}-12x-35$ $10$ $\left(5a+3b\right)\left(3a-5b\right)=15a^{2}-15b^{2}$ $11.\left(x+3\right)^{3}=x^{2}+9x-27+27$ 12. (x-1)= x- +x+1