30б скоро в школу 7 класс 1)(х^6-3x+9)(x^3+3) 2)(n +1/2)(n^2-1/4n+1/4) 3)(1/2a-1/3b)(1/4a^2+1/6ab+1/9b^2) 4)(1/4y^2+yz+4z^2)(1/2y-2z) 5)(3/4x^4-2/3y^2)(9/16x^8+1/2x^4y^2+4/9y^4) 6)(25/36a^6-a^3b^3+36/25b^6)(5/6a^3+6/5b^3)