5a+9b) 2 =25a^2+90ab+81b2
(3x^2-2y)2 =9x4-12xy+4y^2
(3c-10a)(3c+10a)=9c2-100a^2
27a3-64b^3=(3a-4b)(9a^2+12ab+1652)
(2+ **)3=8+ +6x2+*
(*-*)3=*-225x+y+*-27y?
5a+9b) 2 =25a^2+90ab+81b2
(3x^2-2y)2 =9x4-12xy+4y^2
(3c-10a)(3c+10a)=9c2-100a^2
27a3-64b^3=(3a-4b)(9a^2+12ab+1652)
(2+ **)3=8+ +6x2+*
(*-*)3=*-225x+y+*-27y?