9. Obten el producto notable. a x-3x+3= b> 2x-62x+6= c 6a2+3b3b-6a2= d 0,1x2+0,2y30,1x2-0,2y3= e 1/8 z-2+ 1/3 y2 1/8 z-2- 1/3 y2= f m-1,overline 4am+1,overline 4a= g rm+1+25 ° rm+1-25n= h 8ax-1-3bx+13bx+1+8ax-1= i 2/7 xn-2- 1/4 y-1 2/7 xn-2+ 1/4 y-1=

(1) x^{2} - 9(2) 4 x^{2} - 36(3) 9 b^{2} - 36 a^{4}(4) 0.01 x^{4} - 0.04 y^{6}(5) \dfrac{(3 + 8 y^{2} z^{2}) (3 - 8 y^{2} z^{2})}{576 z^{4}}(6) (r^{2 m + 2} - r^{m + 1} \cdot 5^{2 n}) + 25^{\circ} (r^{m + 1} - 25^{n})(7) 64 a^{2 x - 2} - 9 b^{2 x + 2}(8) 64 a^{2 x - 2} - 9 b^{2 x + 2}